Unduh Aplikasi
60.67% Taboo Incest sex stories / Chapter 2516: MY SISTER'S POTION

Bab 2516: MY SISTER'S POTION

I never expected to catch my sister masturbating. It was crazy, as if she wanted to be caught, which didn't fit her personality. I found her lying naked on the couch in the family room with her torso twisted so I could see everything she was doing. She had two fingers deep inside her pussy. Reaching behind herself, she used a finger of her other hand deep inside her ass.

Standing at the end of the couch, I gawked at her. "What the fuck are you doing?"

"Getting off," she gasped, furiously fingering her two holes. Her clothes were in a pile on the floor. The TV was off. I didn't see her computer, tablet, or phone. What she was doing felt wrong. The lack of any reason for her to be doing it felt even odder. It felt inexplicable.

I followed one stupid question with another, "Why?"

The desperate expression on her face chilled me as much as the helpless tone in her voice. "Because I have to."

"Says who?" I asked, unable to stop staring at her nudity or the explicit ways she fingered herself. She didn't stop or try to cover herself like you would expect when getting caught in a compromised situation. It felt surreal. Was she high? Drunk? None of it made sense.

"The voices," she groaned as a wave of pleasure contorted her face. Her eyes fluttered and her mouth hung slack as she began moaning. She wiggled and squirmed against her fingers, forcing her fingers deeper inside her pussy and ass as she shivered with an obvious orgasm. "Oh God," she groaned and began sucking on the finger that had been up her ass. She instantly replaced it with the two fingers that had been in her pussy as she blushed deeply. Finally, it looked as if she was done.

Carol sat upright without trying to cover her nudity. I suppose it didn't matter at that point but it felt strange seeing her sitting naked in the family room. Her face was beet red with how embarrassed she felt, but she didn't move. I became aware of the hard-on growing inside my shorts. I did my best to ignored it even though it felt kinked and I would need to reangle things if it decided to keep growing. "Do you want to get dressed?"

"Yes," she said without moving.

How she sat there blushing without moving made no sense. Her nipples were clearly hard and I watched her chest rise and fall as she continued to breathe deeply following the thrill of her orgasm. I ran through the only list of conditions that made sense to me. "Are you drunk? High? On drugs?"

Looking mournful, she shook her head. Her eyes moved directly to my crotch. In a pitiful voice, she begged me, "Please don't get hard and if you do, don't let me know it."

I struggled with ignoring where she was looking, but I couldn't stop looking at her open nudity. While I would never admit it out loud, Carol was hot in that unattainable, untouchable way. She had always maintained a prim and proper attitude that shut down lecherous comments before they were ever spoken.

The joke was that my sister had "resting pleasant face" instead of a "resting bitch face." She radiated goodness and wholesomeness. Her naturally golden blonde hair never needed the addition of lowlights or highlights. The sun would kiss her hair with extra color. Her straight teeth glistened white from good oral hygiene. She ate like a bird and claimed that working as a daycare teacher was more than enough exercise for her. She radiated an aura that made people want to sit up straighter, mind their manners, and be nice to animals. Seeing her naked and glistening with perspiration from her frenzied orgasm felt as wrong as painting a mustache on the Mona Lisa.

I resisted the growing need to adjust my junk. Carol might be a sweet, innocent angel to the rest of the world, but she was my big sister and my frequent tormentor. I had grown up as the shadow to her radiance. Where she could do no wrong, I seemed to be a constant sad sack. I felt like the runt of a two dog litter. Unlike the rest of the world, I had seen her at her worst. I had heard her belch, whine, and complain like a snotty brat. I had felt her wrath as she laughed at me for being a loser. Still, she was my sister and despite our history, I could tell she was in distress. "What is wrong with you?"

"Nothing," she said, still staring at my crotch as she replaced her lost, worried expression with an impish smile. She clutched at her breasts, pulling and tugging on her swollen nipples. She glanced up at me, flashing that pretty smile that could make the grouchiest stranger smile back. "Pull it out and I'll suck it." Her voice sounded funny as if she was being forced to say the words through a smile she didn't want to display. The difference was in her eyes. She looked at me with her big, blue eyes held wide open in shock and surprise. The look in her eyes didn't match her smile or her words. She went back to staring at the front of my shorts, licking her luscious lips with her tongue.

"Not until you tell me what's going on."

After blinking, she gave me a look of genuine appreciation. It took me a moment to recognize the expression, I had seen it a few times on her face. "It's a spell," she said in her voice. "Technically, a potion. I can't help myself."

"Cut it out," I snapped, rolling my eyes. "Tell me the truth."

"I am," she moaned. "And I can prove it." She glanced mournfully at her clothes without moving to collect them before she stood.

"Do you want to get dressed?"

"Yes," she said in a flat tone, once more sounding drugged.

"Why don't you?"

"I can't, not yet. The potion." She sounded like Carol, but I could tell the words were difficult for her to say as if she had to force them out of her body.

"Right, a potion. I thought you said it was a spell?"

"The potion is the spell," she said, moving towards the stairs to the basement.

Playing along, I followed her. "And how long does it last?"

"I don't know yet," she said in her forced Carol voice.

While I had no idea why she was acting like this, I wasn't going to start believing in spells and potions, not one word of it. I couldn't explain her nudity or open masturbation, not yet, but what the hell, right? Walking behind her, I took the time to adjust my prick without her seeing as I stared at her tanned, bare ass. "Is it fading?"

"I think so," she said, dropping a bit of the forced tone in her voice.

Our basement is divided down its middle. At the foot of the stairs, it's finished and furnished with a wet bar that's always locked, a big screen TV, and a massive sectional sofa for movie nights. Our parents referred to this room as the Media Room. Carol and I referred to it as the Party Room.

A single door in the dividing wall opened into the unfinished part of the basement. In that dark, damp space was meticulously labeled boxes filled with decorations for every holiday and old treasures too valuable to the family for the trash. A single fluorescent light fixture illuminated the space. Carol flipped the switch after opening the door and revealed her handiwork.

Boxes were pushed against the walls, leaving a large open area of bare concrete. In the center of that open area, she had drawn a double circle and pentagram that looked like something out of a cheesy horror movie. Black candles stood at each point of the five-pointed star. Three TV tray tables were set-up with a variety of little bottles lined up in a row. I recognized the bubble-shaped bottles. They had come from that goofy witchcraft store near the edge of downtown.

"Nice try," I laughed, walking around the circle within a circle to inspect the bottles. None of the bottles were labeled, but she had Post-It notes in front of each with instructions written in her tight, tiny handwriting. "Which one is Eye of Newt?"

"Ha-ha," she deadpanned, sounding more normal. "None of them." Moving behind the row of tables and pointing left-to-right, she listed off the names of each one. Most of them held spices or herbs. A few were supposedly filled with the essence of various weeds. Nothing she listed sounded like a drug or poison.

"So you mixed these together and got high? Like some sort of herbal Viagra?"

She shook her head. "There's a spell, too, and can you stop looking at me like that?"

"Hey, you're the naked one."

"I told you, I can't help it."

I spied a clear flask sitting in the middle of the center table. Picking it up, I swirled it around and examined the translucent amber liquid. Flakes of something floated in the mixture. It was easy to guess this was the finished product. "How much of this did you take?"

"One drop beneath the tongue."

"And then what?"

Shrugging, Carol self-consciously draped one hand across her breasts while holding her other over her pussy. "Can I get dressed now?"

"Are you asking me?"

She shook her head, looking as if she was listening for something. Seemingly satisfied, she moved to the open door. I followed her back upstairs. Fishing through her clothes, she kept her back to me as she pulled her panties, shorts, bra, and tank top. When she turned back around, she looked like my sister again. "You can't tell anyone about this."

"About what?"

"Any of this," she said, collapsing on the couch in a heap. "I can't believe I did that."

"Me neither," I said, sitting on the far end of the couch. "Though it was pretty hot. I didn't know you were into anal."

Her cheeks turned red. "I'm not. I've never done that before."

"Uh-huh," I scoffed. No one shoves a finger that far up their butt if they've never done it before.

"I'm serious," she insisted, clearly distressed. "That stuff, that potion, it made me do it." I reminded her about hearing voices and she seemed confused. "Not voices, exactly. More like urges, like unspoken suggestions. Like when you start craving chocolate and you can't stop until you get some."

"And you suddenly craved masturbating where I would see?" I asked. I shook my head, unable to believe a word of it but unable to explain a moment of what I had witnessed. "You know, if you want to be a perv, go for it. I promise I won't tell Mom or Dad, but damn, Carol."

"You don't believe me," she pouted.

"How can I? I mean, I always suspected you were secretly a freak, but this is crazy talk."

"Fuck you," she groaned in a very Carol voice despite using a phrase few would believe she knew. "Which is easier to believe, that the potion works or that I wanted you to catch me doing that?"

Oddly, she had a point. Like I said before, Carol had an aura that kept people in check around her. Maybe it had something to do with her resting pleasant face, I don't know, but I knew my friends could say the rudest things about her until she was in the room and then it was as if a spell came over them. Being her brother, I had always felt immune to her aura. Like I said before, I had seen her at her worst. While the world thought she was a virgin princess, I knew she could swear, fight, scratch, and be a real bitch.

"Then prove it," I suggested. "Take some more and let's see what happens."

"You do it," she said. "It supposed to work equally on men and women. You do it and let's see what happens."

"No way," I said, marveling that she thought I would be that stupid. "What did you really put in that bottle? Jalapeno? Cayan Pepper?" Carol knew I hated hot stuff. Once, when we were kids, she dared me to put a handful of Red Hot candies in my mouth for sixty seconds and I couldn't last longer than five seconds. While this felt an extreme set-up for a practical joke, I still didn't trust her.

"I swear it's not hot," she promised. "It doesn't taste like anything. You just put a single drop beneath your tongue, that's all."

"What's it going to do to me?"

"I don't know. Maybe it'll make your clothes fall off like mine."

"That's what I'm afraid of," I said, more afraid of her pranking me into putting something hot and spicy in my mouth. Unless you know me and the number of times she'd had pranked me during the years you can't appreciate how much of a phobia I had about that.

"What if we dissolve a drop in a glass of water or something? Then, even if it is hot, you won't taste it."

"I thought you said you had to put it under your tongue?"

"I should still work," she said with an easy going shrug before turning on her charm. "If you do it, I'll do it again and who knows what will happen if I do?"

Seeing her in full perv mode did sound enticing. I shook away that thought because I knew nothing would happen. While I couldn't see it yet, she was pranking me. While I couldn't figure out how she was doing it or why the pay-off at the end had to be damn big if she was willing to humiliate herself as she had done. In spite of my skepticism, I found myself asking, "How long did its effects last?"

"About an hour," she said with a smirk. She had already worked out that I was going to do it. While I hemmed and hawed about it, she ultimately turned out to be right.

Before I would do it, I made her show me everything from the book where she had found the love potion (lust potion is more like it) to carefully revealing the contents of each bubble bottomed glass jar. Working my tablet as she described each one, I searched for side effects and any flavor profiles each ingredient had. Finally convinced nothing had a spicy or heat profile, I opted to try a single drop without dissolving it in water.

Holding the pipette with my finger over the open end, I had more question before I risked it. "How long did it take to kick in?"

"Almost immediately."

"What if I try to do something to you?"

"Plu-eeze," she groaned, rolling her eyes. "I think I can still take you." Regretfully, I knew she was probably right. Carol might be a girl, but she was stronger than she looked and I'm a bit of a wimp. Could I help it if we had the same genes? Isn't it funny how being lean could translate into strength for her while I was just skinny and weak?

After sniffing the end of the pipette, I opened my mouth, lifted my tongue, and released exactly .05 milliliters beneath my tongue.

I know she said it would take effect immediately, but I didn't feel anything except relief that it wasn't spicy hot. As she had described, there didn't seem to be a taste to the liquid. Offering her a shrug, I put down the pipette and went upstairs to the family room. I didn't feel dizzy or foggy headed and I certainly didn't hear any voices in my head, though I did feel sort of horny.

With each step upstairs from the basement, I felt my prick growing harder and harder. Okay, so that felt sort of strange, except I'm a guy and I'm used to having erections happen. Guys understand that we can't always control them. I dismissed the sensation as being triggered by the memory of how I had found Carol naked on the couch with fingers buried in her pussy and one up her ass. That's all it was, right?

Walking into the family room, another idea occurred to me. If Carol was a believer in this potion, didn't that give me the ability to prank her? What if I showed her my hard-on? Would it matter or did the bullshit of taking her potion give the perfect cover for doing it? Facing her, I gripped the front of my shorts and showed it off to her.

"See? It's working!" she giggled.

"Yeah, it is," I said, rubbing my hard cock. Damn, that felt good, really good. So did sticking my hand inside my shorts and really touching it. So did pushing down my shorts and underwear so she could see it.

Carol laughed at me getting naked. "What are you doing?"

"It's the potion," I assured her, playing along as I pulled off all my clothes until I stood in front of her completely naked with my massive hard-on throbbing in front of me.

"Damn, bro, you're hung."

"You never guessed that?" I asked, proudly displaying my fully erect cock to her. I wasn't porn star sized, but when I got this kind of hard, I knew I was close to eight inches in length. Showing it off to her felt good, really good. I still didn't see the payoff to her prank, but it felt good believing that I was pranking her back.

"I bet if you shaved you would look even bigger."

Leaving my clothes on the floor of the family room, I walked upstairs to the bathroom in the hall that we shared without a second thought with her following behind me as if I was the Pied Piper. I felt the big smile on my face as I entered our bathroom, fished in the drawer for the scissors she used to trim her bangs and began snipping away at locks of my pubic hair. I trimmed away as much hair as I could before using her razor to shave my cock and balls while she giggled and watched me do it. I even shaved my ass which made her laugh even harder. I laughed with her, enjoying every moment of trying to make this is awkward as possible for her.

Shaved smooth made every touch of my cock and balls feel even better. Glancing down at myself, I did look bigger. As a matter of fact, it looked sexy as hell seeing myself shaved. Why hadn't I done this sooner? Being smooth felt good, really good. So did being naked and hard in front of my sister.

"How's your butt feel?" she asked, clearly enjoying seeing me naked and bare.

Licking my finger, I experimentally caressed my smooth ass and discovered that felt good, too, really good. Wrapping my hand behind my back, I pushed the tip of my wet finger in my ass. Mm, that felt good, but my finger needed to be slippery. I sucked on my finger for a moment, enjoying the shocked expression on my sister's face before pushing my finger deeper inside my ass. Yeah, that felt good, really good, but I needed more spit. I repeated the gesture, licking and sucking on my finger once more before working it all the way inside of me.

My cock ached and throbbed as if I had just spent two hours playing kissing and groping games with my girlfriend. I felt like I had the worst case of blue balls in the history of mankind. I needed to get off really bad and told her as much.

The suggestion she made felt funny. Deep inside, it felt wrong, as if her prank was being revealed to me, but I was helpless to refuse the idea. "You should try to cum in your mouth." I blinked hard, remarkably excited by the idea but unsure how to do it. She must have seen my confusion. She suggested I lay on the floor and put my legs over my head. "Then it will be aimed right at your mouth."

Moving to the floor, I lay on the soft throw rug in front of the bathtub and curled into a ball as my sister had suggested. I made sure my head faced the doorway so that once I had my knees over my head, she would see my upturned ass and see my finger fucking my puckered hole. Tugging and pulling on my hard cock, I wished I could suck it. I tried reaching it, sticking out my tongue without getting close enough. Fuck. I wanted it.

Glancing upwards, over my head, I made sure Carol still watched. For some reason, her watching me felt very important. Staring upwards at my cock, I wondered why I had never thought to try this on my own. My cock throbbed with its need. I could feel a massive orgasm welling up inside my balls as I realized how much I wanted to do this.

Carol had described hearing voices, but it wasn't a voice like someone talking to you. It was more like an internal dialog of thoughts, ideas, and suggestions. She had described it as a craving, but that didn't come close to describing the sensation. It went past craving and into feeling like a need I couldn't control. I had to get off. I didn't have a choice. I had to get off or I might die of sexual frustration. I needed this as much as I had ever needed anything else in my life.

Helpless to stop, I stroked my cock while alternating my gaze. I kept looking at her and then my cock aimed at my face before looking back at her, too. She was going to see me do this. She was going to see me jerking off, fingering my ass, cumming on my face, and eating it. I already knew I would do that. I already knew I was going to eat my cumshot in front of her and I couldn't stop myself.

My mouth stretched open and I stuck out my tongue all the way as the first massive spurt erupted from my aching cock. The long, thick, ropey glob of creamy white cum splashed directly on my tongue and began rolling slowly down my throat even as it followed with another splash of ejaculate. This was the orgasm I craved, the one I needed. I felt my asshole clamping down on my finger, encouraging me to cum more. Spurt after merry spurt of cum flew from my cock in copious amounts I had never generated before that moment. The first couple went inside my mouth before my jerking hand had the rest pasting my face from forehead to chin.

When it was all said and done, I scooped up a final droplet clinging to the slit of my prick and licked my finger clean. Next, I licked the finger that had been in my butt, feeling wildly empowered. Finally, I stood and looked in the mirror to admire my cum-splattered face. I smeared the cum across my face before realizing what I really wanted to do. One fingerful at a time, I scooped it off my face and ate it.

Carol had moved behind me, grinning wildly as she watched me cleaning my face. "Told you," she giggled.

I tried to say something to her and couldn't, I was too busy cleaning my face for words, but I saw the look of panic in my reflection. My eyes looked as hers had, desperate and panicked while the rest of my face looked like I was scooping ambrosia off my cheeks, the bridge of my nose, and my forehead.

Turning to face her, I clutched at my still hard cock, inviting her to look at it. "Let me eat your ass," I said in a voice that felt strange, foreign, and far away. "I want to stick my tongue as far up your sweet ass as I can."

"No," she said and the sensation to lick her ass vanished as quickly as it had appeared.

"Can I drink your pee?" my mouth asked, horrifying me.

"Ew! No!" she said and again the idea vanished from me.

"Thank you," I croaked. It took every bit of will I had to say those words, too.

"But I want to watch you pee," she said.

As if she had flipped a switch, my cock immediately began spraying her as the sudden need to evacuate my bladder overtook me.

"What the fuck? Stop!" she squealed, dancing out of the way of the big, healthy stream of piss. "Do it in the toilet!"

I moved in front of the toilet, raised the seat, and released the rest of my bladder's contents. "Sorry," I sheepishly told her while I peed.

"Dick," she said, blotting at her clothes with a towel. Leaving me, she went to her bedroom as I stood naked in the bathroom and wondered what had just come over me.

Remembering what she had said while we were in the basement, I moved to the mirror and asked myself, "Can I get dressed now?" Without feeling an objection to the idea, I went back downstairs and collected my clothes as my head cleared a bit more. I could remember everything I had done, every second of it. I could even remember why I had done it, how I felt like I was doing it to prank Carol. In the moment, every action I had taken had felt logical and justified. Was this how it had felt to her, too? Dressed, I sat on the couch and pondered what the fuck had just happened to me.

Dressed in clean clothes, Carol passed me on her way to the laundry room with an armful of clothes. "You should probably clean up the mess you made in the bathroom."

"Yeah," I said, pausing for a moment to see if I felt compelled to do it. As near as I could tell, I didn't feel compelled to do it beyond the acceptance that I had made a mess up there. Stepping into the bathroom felt like I had returned to the scene of the crime. Snippets of pubic hair were everywhere on the floor and counter. The same with shaving cream and her well-used razor. At least my ass had been clean before I sucked my finger. I shivered thinking about how nasty all of that had been.

When I was done, I found Carol sitting in the family room. The TV was on, but she wasn't looking at it. Instead, she stared blankly into a corner until she noticed me. "Believe me now?"

"I guess so," I admitted, unable to come up with a different explanation for what had just happened to the two of us. "So, what now?"

"I don't know," she said in the most honest and genuine tone I had heard from her in years. "I can't believe I did what I did." With a tiny smile on her face, she quickly added, "Or what you did. Have you ever done any of that before?"

"What?! No!" I emphatically assured her.

"None of it, right?"

"Right," I said, just as insistently. "I have never shaved down there, fingered myself, or . . . you know, tasted myself."

"Yeah, that part was pretty crazy," she giggled.

I felt embarrassed and ashamed. If I hadn't discovered her masturbating the way she had been, it would have been worse. "Did you know any of that would happen?"

She shook her head. "I didn't think any of it would work."

"Why do it?"

"It's stupid." She shrugged before staring into the corner again with that faraway expression on her face. "I just get tired of being good all the time."

"Ha!" I snorted. I had spent too many years being the victim of her cruelty. The rest of the world might see her as a goody-two-shoes, so prim and proper, but I knew how bitchy she could be. Carol was a chronic rule follower who never drove a single mile over the speed limit for fear of getting a ticket. Back in high school, she always handed in her projects early, studied before every test, and took details note in every class. She never went without a bra and never wore anything scandalous. While all her girlfriends had looked like high-class call-girls in their tight-fitting, skimpy prom dresses for their senior prom, Carol's dress had looked like something out of the Victorian era with its button up front and long sleeves.

"Don't be hateful," she corrected in her typical way. "I know everyone thinks I'm an uptight b-word."

"Bitch," I said, filling in the word she didn't want to say. While I knew Carol could swear, it was rare for her to do it and some words were always off limits around her.

"Yeah," she allowed with a scowl since that was one of her off-limit words. "Don't you ever wish you could be really bad?"

"Who says I'm not?"

Carol rolled her eyes and snorted. "Because you're not," she insisted. "I've seen you in public. Around here, you act like a moody gamer, but in public, you're the sweet, nice guy everyone wants as their friend."

"Fuck you," I growled, dismissing her accurate description of me as forcefully as I could, except we were cut from the same cloth. Just like her, I couldn't leave the house unless I looked nice and I was wearing clean underwear. While I knew I had a dark side, it never showed. If someone offered me an alcoholic drink at a party, I would set it down without drinking it because I still had two years before I turned twenty-one. I knew Carol was the same way because she had taught me that trick. Wait until they aren't looking and then set it down. If they hand you a bottle, block the opening with your tongue because it was better to lie a little to your friends than it was to break the law.

"How often do you jerk-off?" she asked. Just hearing her say those words startled me.

"I'm not telling you that!"

"Once a week? Once a month?"

"I don't know," I said, refusing to reveal such highly confidential information. It was none of her business how often I did that to myself. "How often do you do it?"

"Hardly ever," she said with a sweet smile even as she blushed a bit. "And, whenever I do, I feel so guilty afterward, like I just broke a promise to my boyfriend or something."

"You don't even have a boyfriend."

"I know, but I still feel that way."

"Why not?" I asked, wondering about why she didn't have a boyfriend. "Are you still a virgin?" The way she blushed told me she wasn't.

"But I've never had an orgasm with a man," she said in a very quiet voice. "I mean, I want to, except I can't. It doesn't matter how good it feels, I can't do it. It's like I can't let go or something."

The idea of not being able to have an orgasm felt like such a girl problem. I couldn't imagine having that difficulty although I knew how hard it was for me to get excited more than once or twice with my girlfriends. The first time was always the easiest because I would usually get hard from all the kissing and making out before we got naked, but after we did it, I always felt a little wrong for having sex. Sometimes, I could do it a second time, but that second time never felt as good as the first time. "Can you do it by yourself?"

Carol gave a single, shy nod. "That's the only time and it feels good, but I know it should feel better with a guy."

"What about earlier?" I asked without needing to describe when I meant more than that.

"Best orgasm ever," she said with a wistful smile. "Like really good and I don't even feel guilty about it. Isn't that weird?"

Thinking about how it had felt for me, I searched for the usual sense of guilt I felt after getting off by myself and realized it wasn't there. "I remember feeling embarrassed that you were watching but also loving it that you were there," I said, still working it out. "And I can't believe I peed on you."

"Me either!" she giggled. "But didn't it feel like I made you do it or something?"

"Yeah, it did," I realized. "I mean, you said you wanted to see me do it and just started doing it."

"That's how I felt when you were asking me questions! It was like I couldn't lie to you."

We mulled over our experiences, talking through them with a candor and openness that felt as strange as the effects of the potion. After what we had witnessed each other doing, it made sense. What else did we have to hide?

"Do you think it's a drug of some sort?" she asked.

"I don't see how." I reflected on the ingredients. None of them were known for their hallucinogenic properties. "Did you say something about a spell, too? Did you try it without doing the spell?" She shook her head and I understood. I'm not sure it would have occurred to me mix up a test batch. Like her, I would have followed all the instructions.

"I didn't think it would work until it did." She smiled. "How do you feel?"

"Normal," I said, doing a quick mental assessment. "Actually, maybe better than normal. I feel good. Clear-headed. Nothing feels weird. What about you?" Her smile growing bigger and I could guess her thoughts. "You first," I insisted.

"We should try it again."

"Together?" I asked, immediately discard the idea. "What if something crazy happens, one of us needs to be straight and sober. But what if you tried twice as much? What would happen then? Do you think you would go crazy?"

"Or maybe it just lasts twice as long?"

"We should find out," I said, feeling like an intrepid explorer or a scientist on the brink of an important discovery. As we returned to the basement, I looked again at the encircled pentagram on the floor. "Mom and Dad will freak out if they see this."

"It's why I waited until they were gone, moron." Her insult didn't sting in the least. It had been a stupid comment since Mom and Dad were on a ten-day cruise, that left plenty of time to clean it up. Picking up the flask holding the finished product, she swirled it before carefully sucking on the end of the pipette. Holding it up to the light, she released a bit until only two drops remained. She hesitated before putting it to her mouth. "Don't forget, I'll remember everything even if I can't help myself. So, if you do anything funny to me, payback is a b-word."

"Deal," I said, eager to find out what was going to happen. The first time, the effects seemed to have lasted about forty-five minutes for both of us. "Wait," I said, stopping her before she had released her finger on the end of the pipette. "Maybe I should go first this time."

"Why?"

Looking down at my feet, it took me a moment to admit the truth. "Because it was hot watching you and I'm worried what might happen. It's not like I can control it if I get excited."

"But I really want to do it," she insisted.

"I know, but what if instead of lasting twice as long, it's twice as powerful? Last time, you wanted to blow me."

"And you didn't let me do it," she pointed out, opening her mouth and releasing the liquid beneath her tongue. "I trust you."

"Fuck," I grumbled, unsure if I trusted myself. "How do you feel?"

"Fine," she said, eyeing me like a piece of meat. "For the record, I thought it was really hot watching you shave."

"I did it because you told me to do it," I said, following her as she left the unfinished part of the basement.

"It was still really sexy seeing you do it," she said, still sounding like Carol as we moved upstairs. The stairs opened into the family room. She paused at the top and began undressing. She never turned around. It wasn't a striptease, either. It looked much more methodical than that. Her voice sounded different when she said, "Get naked with me."

"I don't think that's a good idea."

"Sure it is," she said with that same faraway tone in her voice as if she knew what she was saying, but couldn't stop herself from saying it. She tugged on my shirt.

"Stop it," I said, stepping away.

"You're no fun," she pouted, instantly releasing me. Instead, she began caressing her tits, pulling on her nipples and making them hard. "Do you think I'm sexy?"

"Yes," I confessed, feeling awkward admitting it to her for a couple of reasons. First, because I knew there was a chance she would remember my answer after the potion wore off and I would never hear the end of that. Secondly, when she asked that question, she had sounded like Carol again. Had I not experienced the strange effects of the potion, I might have believed she was playing me. Except for being naked, she still looked like Carol. Nothing in her expression suggested that she felt out of control.

"Get naked with me and I'll show how sexy I can be." That time, her voice had that odd sound as if she wasn't really saying that.

"Show me how sexy you can be without me getting naked," I replied, already struggling with a rising sense of excitement. She might be my sister, but she was still pretty and naked and obviously horny. I'm not sure I would have had the same willpower if she hadn't been my sister. I ignored my rising lust.

"Okay," she said, leaving her clothes behind and heading upstairs.

Following her bare butt, I tried not to stare and couldn't help myself. Seeing her all over tan had surprised me the first time I saw her naked and then I remembered that her nail salon included a tanning bed. "Does Mom know you tan naked?"

"Mom told me to do it," she said, sounding normal. "She said it was stupid to use a tanning bed and wear a bathing suit, too."

"Does Mom know you shave your pussy, too?"

"I waxed," she said with clipped syllables as if she didn't want to tell me. "A dare. From Susan." Turning to face me, her voice changed back into that other voice. "Want to feel how smooth?" She tried pulling my hand to her bare pussy.

"No!" I said, pulling my hand away. The truth was, I wanted to feel, but I couldn't. One of us had to be strong.

"Mm, but it feels soooo good," she said, caressing herself for me. "And I'm so wet, too." She raised a glistening finger to her lips and licked it clean before burying her finger inside her pussy and holding her hand there as she walked towards her bedroom with its pink walls and frilly bed cover. Shelves running about her bed displayed a mix of trophies won from a variety of speech and debate tournaments. Mixed between the trophies were her favorite stuffed animals.

Still holding her pussy, she pulled open her underwear drawer with her left hand. After fishing around beneath the tangle of cotton, silk, satin, and lace, she surprised me by producing a lifelike dildo.

"Oh my God, does Mom know you have that?"

"No," she replied in her voice as a smile grew on her face. "But you wanted to see how sexy I can be." Sitting at her desk, she opened the lid of her laptop and the dildo flopped as she typed in her password. Being very right-handed, she giggled when it took her two tries. Looking over her shoulder at me, she asked, "Are you sure you don't want to get naked with me? We can have a lot of fun."

"I'm sure."

"Please?" she asked, still talking in her Carol voice. Oddly, it looked and sounded like she was begging me to do it. Shaking my head, I stood my ground. The funny smile that appeared on her face was unlike any smile I had ever seen her wear before that moment. Something about that smile looked sinister.

Pausing to lick her finger clean, she decided she needed her right hand to work the mouse and I watched as she opened her web browser and typed with both hands while holding the dildo in her mouth. I watched as she entered the address of an adult cam site. She surprised me a second time by logging into it with a username and password.

"You've been here before?"

She pulled the dildo out of her mouth long enough to say, "Just to watch." Still holding the dildo, she clicked on the button in the corner that read, "Broadcast yourself."

I freaked out. Even without knowing the site, I could guess what that button did. "What are you doing? You don't have any idea who's on the side?"

"I know," she said, pushing back her chair, parting her legs for her webcam and caressing between her legs with the dildo. Even as she got started, I saw a counter in the corner of her preview screen beginning to advance. It quickly increased from one to two, to dozens of people eagerly clicking to watch her. I couldn't blame them. If I had been on the other end of the internet and saw someone as attractive as her displaying herself, I would have clicked on it, too.

There was a chat window to the side of her preview window and I watched as the comments began to flow. Rude, crude and outrageous comments. "Fuck it, girl!" "Suck it!" "Fuck your ass!" One demand after another showed up along with compliments. "Hottest ever!" "100 Stars!" Snatching her mouse, Carol deftly opened a second window.

"This is why I really come here," she said, clicking the tab that offered to show the cams of any guys online. Within moments, she had arranged different windows on her screen until she could see several guys at once along with her preview window.

"Have you done this before?"

"Not broadcasted, but you said you wanted to see how sexy I can be." Her voice sounded normal, not forced as she settled back to enjoy the show.

"But what if someone we know is watching?"

"I know," she said, flashing me that sinister grin below a look of wide-eyed panic and I could tell it was the potion working its magic on her. She was well aware of the risk and unable to prevent herself from doing it just the same.

"Stop it," I said, hoping my words would have some pull on her.

"I can't," she groaned. "Too hot."

"Is that why? Because you're too turned on?"

She managed to shake her head. "Because you wouldn't," she managed in that clipped tone from earlier.

"This is so wrong," I gasped, helpless to stop her as she stood, turned and poked her ass towards the camera. It took a second for me to realize she was reacting to one of the comments in her window telling her to show off her ass. The words were small in that window, but one horndog had typed in all caps so she could see it. I saw what he said next.

"FUCK THAT ASS!"

As if she was nothing more than a puppet on a string, Carol pulled the toy from her pussy and began trying to shove it in her ass.

"Lube first," I said, genuinely afraid she was going to hurt herself. Her gaze darted in my direction, I saw the fear and panic in her eyes, but her hands didn't stop trying to poke the toy in her butt. Fuck, I thought as it occurred to me that she couldn't help herself. Glancing around her room, I spied a bottle of lotion and grabbed it. "Use this," I said, reaching over and squirting it between her legs.

"WHO IS THAT?" the person with cap lock in place asked.

Typing with her bad hand, Carol still managed to reply, "my brother."

With the addition of the lotion as a lubricant, Carol began experiencing greater success with working her dildo inside her ass. I heard her gasp as it found purchase. Furiously rubbing her clit, she had a huge orgasm before she began coating herself with the extra lotion I had squirted between her legs. She rubbed her stomach, chest, and thighs until she was glistening. The entire time her eyes flickered across the screen and I knew she had to stop noticing the comments from that prick with the caps lock on.

"Show me the cams you like best," I asked, taking control of her mouse and pointing to each of the windows showing men doing stuff.

"Yes," she gasped as the mouse passed over a cam showing two guys naked guys sitting side-by-side. Double-clicking brought the cam to fullscreen, hiding the chat window while still showing her preview window.

"Really?" I asked, startled by her choice of cams as the two young men began stroking each other's pricks. My sister liked gay porn? She nodded, still working over her body as she thrilled at the visual. The two guys looked close to my age. Both were shaved and hard as hell. Quite unexpectedly, one of them flopped over and began sucking on his buddy's hard cock.

"Yes!" Carol cried out, experiencing another huge orgasm.

"For real?"

"Yes!" she insisted, licking her lips as she watched.

"What else are you into?"

After clicking the ESC button on her keyboard, she took the mouse away from me and double clicked on a different cam. In the new cam, another guy around my age and build sat facing the camera with a dildo up his ass. Carol mimicked his positioning and rubbed her clit while watching him stroking his cock. It took me a second to realize she was also matching his dildo strokes with her own stroking. Once again, she shivered with an orgasm from the thrill of it.

"You like seeing him do that?"

"He looks like you," she said, flashing me a big smile.

I ignored her comment. That felt too weird. "Does that toy feel good up your butt?"

"Yes," she said in her voice. I stared in her pretty blue eyes, trying to find the lie inside her eyes and couldn't. "Get naked," she insisted, except I could hear the difference in her tone. It might sound like her voice, but it didn't sound like her vocal pattern.

"Why?"

"Suck you," she said with a smile. Oddly, her voice sounded like a mix between the strange tone and her normal voice.

"Fuck?" she asked in that same mixed tone.

"Later," I said, very aware of how turned on I felt. Once it felt like she was out of danger of hurting herself, my arousal had returned full force. Knowing people still watched her, I needed to get her away from the computer. "Come into the bathroom with me. I want to watch you pee."

Without a word, she stood and I shut the lid of her computer, ending the show. If we were lucky, no one we knew had caught her show. I followed her into the bathroom, confused when she straddled the toilet, facing towards me. Bending her knees, she splayed her pussy lips while holding the toy up her butt with her other hand. Looking down and giggling, she released her flow, peeing from a mostly standing position.

After the last drop, I suggested we go back downstairs, anywhere except near her computer again. I had no idea how much longer the potion would keep hold of her. Back in the family room, she crawled on the coffee table, pointing her filled ass directly at me as she watched my reaction. Suffering in silence, I sat with my legs crossed as my sister got herself off again and again. Each of her orgasms seemed as mind-blowing as the one before it. Part of me felt envious at her endurance, stamina, and ability to keep getting off. I kept the lump in my pants well hidden from her.

Eventually, she seemed to regain control over herself. Following one more orgasm, she eased the toy from her butt and stared at it. "Did that feel good?" I asked.

"Yes," she said in a faraway voice, but in a tone that belonged to her.

"Does your ass hurt?"

She shook her head, looking a bit puzzled. She glanced at her clothes near the basement door.

"Would you like to get dressed?"

"Shower," she said, managing a tiny smile.

"That's a good idea," I said, sensing that the potion was at its very end. "Why don't go upstairs and shower? I'll wait for you here." Looking grateful, she nodded, walking past her discarded clothes on the way upstairs. While she was gone, it was everything I could do to stop myself from jerking off in her absence. I didn't risk it. Besides, wasn't it my turn to go next?

With one towel wrapped around her head and another around her body, Carol returned to reclaim her clothes. She flashed me a sheepish smile before stepping around the corner to get dressed.

"Do you feel okay?"

"You mean aside from feeling embarrassed as hell?" she asked. "Other than that, I feel good."

"Sore?"

"Not even a little," she said, stepping back into the family room. She eyed the coffee table as she walked past it, surely remembering what she had done while kneeling on top of it. She sat on the opposite end of the couch again. "Thank you for staying dressed."

"It wasn't easy," I confessed. We sat in awkward silence for a couple minutes before I broke it. "I didn't know you owned a sex toy." Carol instantly blushed deeply.

"It was a joke gift from Susan."

I laughed. "Susan is a bad influence on you."

"Don't be mean," she said. "Susan is just more open than me, that's all."

"Do you remember everything you did?"

Her blush returning deep and dark, she nodded. I asked about the website she had visited and why she had an account. "It times out if you don't have one," she said. "I can't believe I was on cam." I told her about how she was following the instructions from that one guy. "Oh, I know! I couldn't stop myself! It was like, because you wouldn't do anything, then those words became the best idea."

"I was afraid you were going to hurt yourself."

"That lotion costs thirty dollars a bottle."

"Sorry," I apologized.

"No, you're fine," she said with a quick, forgiving smile. "Just wish there had been something cheaper nearby." She shrugged away the expense. "You're a good little brother."

"No, I'm not," I said, knowing how close I had come to taking advantage of her. We talked about the potion. Apparently, twice as much meant it had lasted twice as long instead of being twice as intense. "What if you had done a shot glass full of it?"

"Oh my God," she gasped, revealing how close she had come to doing it.

We did the quick math. If one drop equaled .05 milliliters and lasted roughly forty-five minutes, then a shot glass amount would last nearly a month.

"Would it really be a month of needing constant orgasms?"

"I don't know," I said, unable to imagine how a person could function like that.

"Do you still want to take another turn?"

"Yes," I said, immediately standing, which revealed the lump I still sported.

"Do you even need it?" she smirked.

"Pervert," I said, already heading downstairs. There were no two ways about it, I definitely wanted my turn. After enduring my sister's lustfulness, I needed it. As I filled the pipette, I considered the need I felt. "Do you think stuff is addictive?"

"Maybe." Her eyes following the flask and then the filled pipette, as if it was token held by a hypnotist. As I tossed back my head and opened mouth, she stopped me. "Wait, any conditions before you try it?"

"Just don't let me try to rape you." It was the same concern I had the first time, too.

As I released the pipette beneath my tongue, Carol asked, "What if you want to jerk-off in your face again?"

Deep in the back of mind, I felt an instant stab of regret for not mentioning that. Instead, I heard myself tell her, "It's all good."

"Are you sure?"

"Yeah, I'm horny as fuck," I said, already rubbing the front of my pants. Damn, this shit worked fast!

Smiling, Carol suggested we go upstairs so I could show her how horny I was. As I walked upstairs, I thought about how I felt. Aside from feeling remarkably horny, I felt in control of myself. Well, except for how eagerly I got naked as soon as I reached the top of the stairs, that felt out of character. Then again, was it really? I was horny before I took the potion. Downing it meant I was free, didn't it? Just like before, I could say or do anything and later I could blame to potion. I felt free.

"Do you still want to touch?" I offered, waving my naked naughty bits at her.

Carol looked apprehensive as she eyed my hard cock and freshly shaved balls.

"Aw, come on," I chided, daring her to do it. "Just because I didn't touch you doesn't mean you can't touch me, does it?" I wondered how I sounded to her. Did I sound like me or did I sound slightly off like she sometimes did?

"You look so hard," she said, looking tempted.

"And you can do anything you want to me," I assured her, desperately hoping she would try touching me.

"I want to see you get off, first."

"Like before?" I asked as if jerking off again was the greatest idea I had ever heard.

"Sure," she giggled, looking delighted at my enthusiasm. "Did you like doing that?"

"Yes," I said, feeling the answer flying out of me unforced and unfiltered. "I tasted good."

"Show me how much you love it," she laughed as I got on the floor in front of the couch. Carol climbed on the couch, tucking her legs beneath herself while I used the front of the couch to hold myself curled into a ball with my dick pointed at my face. Leaning over, she looked down at me and asked, "Aren't you forgetting something?"

Oh yeah, I thought, remembering how good my finger had felt up my ass. Sucking on my finger, I got it good and wet before reaching around my thigh and poking it deep inside my ass. Damn, that really did feel good.

"Maybe you should use two fingers," she suggested, smiling down at me. What a good idea! Pulling my hand back, I slobbered over my index and middle fingers, not even caring where my one finger had been. If anything, knowing it had been up my butt made it feel sexier.

I pushed two fingers inside my ass and moaned. If one felt good, two felt so much better! It felt really good! My cock twitched and throbbed with its pent-up need from watching her. Seeing her watching me made it even better. A clear droplet of precum appeared on my cockhead, oozing from the slit of my dick until it built up enough presence to turn into a real drop. Opening my mouth, I caught it directly on my tongue as Carol delightedly giggled.

"Do it," she cooed. "Make it cum a whole bunch like last time and eat it all!"

As if her words were my trigger, my mouth gaped open as my cock exploded in my pumping hand and spurt after spurt of my creamy cum began pouring from me. My previous orgasm didn't seem to matter one bit. Like before, my orgasm felt porn-star big with one solid ejaculating pulse after another pumping out my cream directly into my mouth. As I came, I wiggled my fingers inside my ass, coaxing my body to keep going. In a strange way, the arrival of orgasm felt much like when I had accidentally peed on my sister as if her command was all it took to make it happen.

"So hot," she groaned. "I'm not even potioned-up and I'm hot as hell watching this."

"Do you want to touch me now?" I asked, remembering her earlier condition. "I came, just like you wanted."

"In a bit," she said, filling me with frustration and disappointment. I ached for her caress and she all she did was smile at me.

"Cunt," I said, trying desperately to hold back the abrasive word and failing miserably. "That's all you are, a stuck-up, good for nothing cunt. It's no wonder you need a friend like Susan to buy you sex toys. It's no wonder your frigid with your boyfriend. You don't know the joy of sex. Have you ever tasted a man's cum?"

The abusive tirade poured me unabated. I couldn't stop myself. I saw my sister recoil as if she had been slapped in the face. Her smile vanished as her mouth gaped open and her eyes went wide with shock. When her face turned red, I assumed she was blushing. I couldn't be farther from the truth.

"Let's go upstairs," she growled with anger. "Back to my bedroom. We can have some fun, I promise."

I uncurled from my ass-up position against the couch, eager to follow her. "You should get naked with me."

"Maybe I will," she teased, leading the way. Following behind her, I pulled on my still engorged prick, caressing that magnificent rod of pleasure. When I fondled my balls, they felt heavy and ladened with another orgasm as if none had happened. I stared directly at her wonderful ass, fantasizing about seeing her naked again and all the things I could do to her.

Sitting at her desk, Carol reopened her computer, bringing it back to life. The multitude of windows she had opened were blank. Standing very near, I watched as she signed back into the webcam site. I pushed as close as I could until I felt the heat of her body against the tip of my prick.

"Don't you dare touch me with that," she cautioned and it felt as if her body heat had become an impregnable shield to me. With her session restored, she opened a couple windows of naked men. In the first, a man had his webcam focused directly at his hard prick, filling the view with nothing more than his cock, balls, and his stroking hand. "Does it excite you to see that?"

"Yes," I whimpered, trying hard to hold back the word, but unable to keep it to myself.

Carol's smile returned as she invited me to sit in her chair. Leaning close, she whispered in my ear and I felt her breath hot and wet against the side of my face. "I believe this potion works as some sort of truth serum. I think it releases our innermost desires and brings them forward, even the things we're sure we could never do."

Her words felt true to me, but meaningless at the same time. I kept staring at the large prick displayed on her screen.

"Tell me what you would do to him if he was here in the room this very moment."

"Suck him," I confessed, feeling the thrill of my confession at the same time that I felt the distant horror of saying it. "I want his cum."

"You love cum, don't you?" she asked, giggling.

"I do," I whimpered, wishing I could hold back the words coming out of my mouth.

After clicking the "Broadcast Yourself" button, she handed me her dildo. A small preview window opened in the corner where I could see myself sitting naked and hard. "Show me. Show the world what you want to do."

I began sucking on the latex representation of a man's cock. I slathered the smooth head with my tongue between bobs of my head as I stared at the cock on screen. Though the toy was fake, the sensation felt real to me. I couldn't distinguish between the toy and the cock I watched onscreen. My mouth felt filled with the flesh and blood of a real cock swollen and straining for release.

With my other hand, I stroked my cock. I tugged and pulled on it as I sucked on the not-quite-real cock in my mouth. One sensation fed the other. In a very strange way, I had the stranger's cock in my mouth along with my own. I felt as if I was sucking every cock I had ever seen and I liked it.

"Fuck, that's hot," Carol said, standing next to me and watching. In the preview window, I could see the panic in my eyes before I glanced at her. Even without the potion's help, she looked flushed and excited. "Suck it, bro. Suck it good. Make him cum in your mouth."

I felt helpless to resist the sensations of joy inside of me. Despite never having a gay thought before that evening, my mind filled with the possibilities of being with another man in the sickest, twisted, and delightful ways. I wanted this. No, that's not how it felt. I needed this.

"Can you cum again?" she asked. I nodded, immediately feeling the need within my balls. "Cum on your toy and lick it clean. Let the world see how much you need it."

I heard myself moaning as I lowered her fake cock between my legs. Taking careful aim, I allowed the joyful sensation of another orgasm to overcome me. Once more, I erupted with spurt after spurt of sperm filled cum. It splashed on the toy, coating it like mayonnaise on a Fourth of July hot dog. Carefully bringing it back to my mouth, I began licking clean the toy. I sucked on it. I made sure to ingest every drop of my orgasm and found myself wishing for more.

"Now let him fuck you," she suggested, tapping the keyboard and bringing a pair of men into view. One man straddled the other, facing the webcam as he impaled himself on his friend's massive cock. The cock of the man getting fucked was hard, too. As I watched their union, I filled my asshole with her slick toy. When I needed more lubricant, I licked at it and tried again until I had the toy buried deep inside my ass. My cock danced and throbbed in time with my thrusts.

"No way," she gasped, laughing at me. "Cum again for me. Cum for all of them."

My eruption happened immediately. I magically came in another round of huge spurts that felt as good as my first orgasm. In the back of my mind, I knew it didn't make sense. I shouldn't be able to do that. Repeatedly cumming that hard defied the workings of my body as I understood it. But the proof rolled down my chest and stomach. I had cum again and loved every second of it.

"Clean yourself up," she said and I did so without removing the toy from ass. Feeling filled felt too good. Instead, I scooped up one rivulet after another and fed it to myself. Closing her laptop, Carol leaned close to say one more thing. "Now the whole world knows you love cock."

Rather than complain about what she had said, I smiled at her. "Will you touch me now? You know you want to."

Glancing down at my swollen cock and balls, I watched Carol consider the proposition. I could tell she was curious how my shaved parts might feel.

Instead of touching me, she asked, "Are you done with my toy yet?"

"Almost," I said, starting to feel the effects of the potion wearing off. The toy still felt good, but not quite as good as before. After I slowly eased it from ass, she suggested we go back downstairs. I stood up and led the way.

Back in the family room, I sat slouched on the couch and watched as I caressed my hard cock. It did look good shaved and touching it felt good. However, I became increasingly aware of my sister sitting on the far end of the couch and how she was watching me. The longer I sat there, the more awkward that began to feel.

"Why don't you get dressed?" she asked and that felt like a very good idea. Picking up my clothes, I stood to the side of the opening to the family room and got dressed. The potion had worn off and I was left with a hard-on, a pleasant feeling deep inside of me, and the shameful memory of everything that had just happened.

"Welcome back," she said with a gleeful smirk. "Did you have fun?"

Struggling to find an ounce of anger, I found I couldn't. Was the potion still wearing off? "I can't believe you did that to me."

"Did what?" she asked if she was as innocent as an angel.

"Put me on cam," I said, still unable to feel outraged. I did feel ashamed and embarrassed, but not angry."You said I could do anything except let you rape me."

"I guess so," I mumbled. "But you went too far."

"Really? After what you said to me, you really think I went too far?"

"That wasn't me," I said. "I don't really feel that way. I was just so pissed off that you wouldn't touch me."

"I know," she said, leaning over and touching my arm. "I could tell because you sounded different. Not completely different, but different enough."

"That happens to you, too," I said, describing how her voice was the same, but different, too. She nodded the entire time.

Sitting on opposite ends of the couch, we analyzed everything that had happened. She wanted to know if I felt like I had latent gay tendencies. I told her I thought it had more to do with seeing her watching cams.

"I think I wanted to get you excited." That explanation made better sense to me than imaging that I was secretly gay. There was another part of the experience that really bothered. "I can't believe how much I came. I mean, every orgasm felt as strong and powerful as the first one." She looked confused and I explained to her how guys needed recuperation time between orgasms, especially to rebuilt their spunk. While I didn't quite understand the physiology behind it, I knew it was true.

"Maybe it's magic," she suggested and I laughed long and hard. No, I take that back. I laughed until I remembered the pentagram drawn on the floor of our basement, the black candles, and how she had said it all required reciting a spell, too. Smiling patiently, as if I was the slowest student in the class, she asked another question I couldn't explain. "How's your butt feel?"

"Fine," I said, immediately realizing that I should be sore.

"Mine, too," she said.

"How do you think it would feel if we didn't use the potion?"

"Try it and find out," she joked. I shook my head. That would be a mystery for another day. "What about feeling tired?"

"I'm more hungry than tired," I realized even though it was nearing midnight.

"Me too," she said, heading into the kitchen where the two of us took turns heating up food in the microwave. By that time, it was after midnight and bed sounded like the reasonable suggestion. Following her upstairs, I admired her ass without fantasizing about it

"Good night, Carol," I said from the top of the stairs before turning towards my room.

"Night, bro," she said and for a brief moment, I thought we were either going to hug or kiss. Instead, she turned and headed to her room, too.

Sleep eluded me for hours as I laid in bed and tried to make sense of the evening. My mind flickered from one improbable event to another, starting with how I had found my sister naked and masturbating to the number and copious volume of my orgasms. None of it made sense unless I allowed for the possibility of magic.

My cock swelled and throbbed until I couldn't stand it anymore. Climbing out of bed, I stripped down and began pleasuring myself to memories of my sister naked and fingering herself. Touching the smooth flesh around my cock felt naughty and good. It took a while before I reached my climax. Cupping a hand in front of my prick, I spewed my seed into my palm. The orgasm felt good but not as good as when I was on the potion. My orgasm came out as little more than a dribble as if my body had nothing more to offer. On a whim, I licked my palm clean. My cum still tasted the same. I refused to acknowledge if I thought it tasted good or bad.

That familiar sense of vague guilt crept over me as if I had somehow cheated by masturbating. I knew that feeling and brushed it aside. Feeling normal felt good and a bit disappointing. Back in bed, I curled up and eventually found sleep.

In the morning, I felt good despite my limited sleep. Being shaved bare still felt strange. Unable to take all my classes online, I had to venture out into the world. While I ate cereal in the kitchen, Carol came downstairs dressed for work. We gave each other sheepish smiles. "How do you feel?"

"Good," she reported. "In fact, remarkably good. You?" I assured her I felt the same way. To my eyes, she looked better than good, she looked radiant. It felt funny seeing her as a woman, as attractive as any woman I knew. I considered telling her about jerking off last night and how it had felt normal. Instead, I kept it to myself.

After my last class, I drove straight home. When I opened the door to the unfinished section of the basement, I was greeted by the pentagram encircled twice. Seeing the arcane symbol felt strange. I didn't feel filled with dread, more with the fear of the unknown. I gave the diagram a wide berth. I wanted to explore the ingredients, trying to apply logic and reason to the inexplicable events of yesterday.

None of it made sense. How could combining these simple ingredients have such a profound effect on libido and physiology? I made a list of them and headed to my room for more research. I found a number of sites devoted to the black arts and magic spelled with as "magick" as if that changed the word. I couldn't go there. Believing in magic held implications I couldn't consider. Instead, I choose to believe Carol has somehow stumbled upon an herbal version of Viagra.

With the house to myself, I realized I had the opportunity to conduct another experiment. Stripping naked, I surfed to one of my favorite porn sites and began stroking myself. I'm a lotion sort of guy and kept a bottle of unscented lotion hidden in my room for just such an occasion. As I worked the lotion across my smooth flesh, my body welcomed the attention as much as my libido did. Being hard felt as good as ever.

Reaching beneath my balls, I ran a slippery finger across my butt and shivered with unexpected pleasure. I wasn't expecting that. I had never considered my ass an erogenous zone, but I guess I had been wrong. I experimented with inserting the tip of my finger inside that tight, puckered opening and discovered that felt good, too. Really good. Recalling yesterday, I experimented with a second finger. That felt more filling. Before I knew it, I sprayed my stomach with my orgasm.

Looking down, I noted the amount of my cumshot. It looked normal. Except for the two fingers I had pushed inside my butt, everything about my orgasm felt normal. Wiping lotion off my finger, I tried tasting my orgasm again. It tasted vaguely salty. Perhaps more revealing, I realized it tasted the same as it had when I orgasmed directly into my mouth. I made mental notes about the experience as I cleaned up.

Checking the time, I saw that I still had over an hour before Carol returned from work. I considered the flask of potion two flights of stairs away. Should I risk trying it alone? There hadn't been any ill effects from using it. I had the time, especially if I limited myself to a single drop. Throwing caution to the wind, I decided to give a try.

Oddly, nothing happened. I even tried to jumpstart its effect by returning to my room and getting naked again. I got hard and that felt good, but I didn't feel that same urgency as before. I tried jerking off, but plateaued somewhere before my climax.

Shortly after discovering the joys of masturbation, there had been a day when I had decided to see how many times I could get off. Hidden in my room, I had jerked off over and over again. The first three orgasms had happened relatively quickly. On my fourth try, it had taken a long time to push myself over the edge. On the fifth try, I never did it. I had gotten excited, hard, and close to an orgasm, but had never quite managed to find the extra thrill required to push me over the edge.

That's how I felt, excited, hard, but an orgasm felt out of reach. That didn't make sense. Had the potion stopped working? Did it only work on the day it was created? Did I need more of it? Remembering the math of how long it lasted, I dismissed the idea of taking a second dose. After an hour had passed, I gave up trying. I probably could give myself an orgasm, but it would be forced and I didn't want that.

When Carol came home, I told her about my experiments, starting with jerking off last night. Admitting that I had masturbated felt embarrassing as hell. Carol did her best at keeping herself in check, but wouldn't stop grinning. "What?" I demanded.

"It's just funny hearing my brother telling me that he played with himself."

"Do you want to hear about this or not?" She nodded and only giggled a little as I described the reduced emission from last night's final orgasm. I left off tasting it, that was none of her business. When I told her about that afternoon, I left out the part about fingering my ass, too. Despite yesterday's events, admitting any of it to my sister felt too embarrassing. Finally, I reached the part where I had tried self-dosing and its lack of effect.

"Are you crazy?" she asked, chiding me for doing something ask risky as taking it alone. "What if something bad had happened?"

"That's just it, nothing happened at all," I insisted. Her point wasn't lost on me, except I couldn't change what had already happened. She made me promise not to do it again before we could talk about anything else, including the lack of any effect on me. "Do you think it has an expiration date? Maybe it's only good for a single day."

"Maybe," she allowed, thinking it over before coming to the obvious conclusion. "I guess there's only one way to find out, right?" I followed her downstairs and watched as she carefully mixed the elixir with the pipette before filling it. Before releasing her dose, she made me promise I wouldn't let her broadcast herself on that cam site. She released her finger on the end of the pipette and we waited to see what would happen.

"How do you feel?"

Carol shrugged. "The same as always."

"Do you want to get naked?"

She shrugged again. "Not especially. I mean, I like being naked. It feels sexy being naked, but it's not like yesterday when I felt like I needed to be naked."

"Maybe it needs more time to work?" I asked. We went upstairs to the family room. Yesterday, that was as far as we had to go before it had clearly kicked in. I waited for her to do something and nothing happened. "Still don't want to get naked?"

"Not like yesterday. It's like I said, it's fun being naked, but I don't feel a need to do it."

"What about play with yourself?"

Carol smiled. "I've wanted to play with myself all day. I did it last night, too, like you did, and it felt good."

"But what about right now?"

"Sort of?" she said as if asking herself. "I mean, I feel really horny, but like I said, I felt horny all day. I kept thinking about you and seeing you naked again. I like seeing you naked. I like being naked in front of you and I really liked watching you jerk-off." Smiling, she squirmed a little and I wondered if the potion was beginning to take effect.

"What else?"

"I just like you," she said with a faint blush pinking her cheeks. "I think you're sexy. It's why I have to be mean to you so you don't know how much I like you. Did you notice all those guys I picked out yesterday? Did you notice how they were all built like you?"

"Interesting," I said, referring more to how open she was being. "Tell me more."

"It's why I wanted you to finger your ass and cum in your mouth because that's what they do."

"Wait, because that's what they do or because they remind me you of me?"

"Both," she said with a big smile. She tucked her heels beneath her butt, getting comfortable and I saw the sparkle in her eye. She leaned towards me, touching my hand. "They remind me of you. You remind me of them. So why wouldn't I want to see you do the same stuff they do?"

Her logic made sense. More importantly, I detected the effect of the potion. While she didn't feel the uncontrollable desire to get naked, the truth serum part still worked. What about the suggestion part? What if I told her something to do, would she do it? "Stand up," I said.

"Sure," she said, untangling her legs and standing. "What's up?"

"Turn around and let me see your ass."

"Um, okay," she said, turning to show me her backside. She looked at me over her shoulder. "See something you like?"

"Maybe," I said, unsure if she was following my directions because of the potion or just because. I needed to be more direct. "Get naked."

"Why?"

"Because I want to see you naked."

"And then what? Are you going to get naked with me?" She sat back down and smiled at me. "I'll do it if you do it."

"But you don't feel like doing it just because of the potion?"

She shrugged. "Maybe a little, but I don't feel like I have to do it, does that make sense?"

I nodded, racking my brain for something outrageous to ask. "Do you want to fuck me?"

"Yes," she blurted out, immediately covering her mouth with both hands and giving me a panicked look.

"Did you want to tell me that?" She vigorously shook her side-to-side. "But you really do want to fuck me, don't you?" With the same wide-eyed expression of panic in her eyes, she nodded just as vigorously. I peppered her with more embarrassing questions. "Are you wet?" She was. "Are your nipples hard?" They were. "Did you think about me when you masturbated last night?" She had. "Did you finger your butt last night?"

"I'm not answering that," she said even as her head bobbed up and down.

"Did you use your toy again?"

"No," she said without the head bob. Either the potion was wearing off or she was telling the truth.

"If I got naked right now, would you suck me off?"

"Are you going to potion-up first?"

I glanced at the clock and saw forty-five minutes had passed. "I think the potion has worn off."

Considering that for a moment, Carol smiled before saying, "I didn't mean any of those things I said."

"Wait, that's unfair!" I complained, remembering how the potion had made me feel like I had a ready excuse for doing and saying stuff I would never do under normal circumstances. Either her answers had been lies or the comment she had just made was a lie and I couldn't tell the difference.

"Guess it's your turn so I can ask the questions," she said with a sly smile. She was right, too. If I was willing to take another dose, then I would know if first hand if I could lie under its influence.

"Fine," I said, leading the way downstairs.

Carol didn't start the questions until we had returned to the couch in the family room. "Do you want to show me your dick?"

"Yes," I answered, learning nothing. Wanting to do it and being willing to do it were two different things.

"Then go for it. Let me see it." Though I felt sorely tempted by her invitation, I found it easy to resist that temptation. She looked disappointed and that made me smile. It felt good being in control. "Did you like eating your cum?"

My single word answer flew uncontrollably out of my mouth. "Yes." I heard myself saying it. I felt myself admitting it. I also felt embarrassed admitting it.

"Would you ever do it for real?"

"Do what?" The question felt too ambiguous to answer.

"Suck off another guy for me."

"Yes," I said, blushing deeper. "I would do anything for you."

"Then get naked."

"No," I said, remaining in control of that part of myself.

"Are you hard?" she asked. I nodded. "Show it to me." Though tempted, I didn't. Again, she looked disappointed. Her disappointment didn't last. A sly smile appeared on her face before she asked, "Do you love me?"

"Yes," I confessed.

"But you never tell me that."

"You're my sister. I have to love you."

"Do you want to make love to me?"

"Yes," I said, frustrated that I couldn't withhold that single word.

"Did you ever check me out before seeing me naked?"

I managed to reduce my answer to only a nod, but that was still an answer. When she asked me to explain, I had to use words as I told her about getting excited at seeing her in a bikini. Blushing madly, I confessed to jerking off while thinking of her tight ass and perfectly shaped tits.

"Do you really think my tits are perfect?"

After I nodded, she asked why and I explained how I thought her tits were the perfect combination being a handful without being too big and how much I liked her nipples. Unable to stop myself, I added that I wished she wouldn't wear a bra so often because I really liked seeing her nipples poking through the fabric of her shirt.

Reaching behind herself, Carol undid her bra. Doing nothing more than fishing beneath her t-shirt, she worked one strap off her left arm before pulling her bra out of her right sleeve. It looked like an amazing magic trick. After smoothing down her shirt, I saw her nipples stiff and hard against the thin fabric of her shirt.

"Does this make you want to get naked?" I nodded. "Then do it," she told me and I resisted. As much as I wanted to do it, I didn't feel compelled to do it. I did ask if I could see them and she just laughed at me. "Get naked and I'll get naked."

"See? That's really tempting," I said, recognizing that she was testing the potion.

"If I brought a boy home and wanted you to suck his cock for me, would you do it?"

"Maybe," I said. "Depends on who it was and how excited I was."

"But you wouldn't be mad at me for making you do it, would you?"

"No," I said, marveling at my candid reply.

"If it got me really excited, would you let him fuck you, too?"

"Maybe," I said, excited by the idea. Seeing her squirm made me feel even more excited at the idea.

"What if we each brought a friend over and gave them the potion?"

"My friends wouldn't need the potion to fuck you. They all think you are hot."

"I don't want to fuck your friends," she said.

"Do you want to fuck me?" I asked.

She only smiled. Instead of answering, she turned the question around. "Do you want to fuck me?"

"Yes," I said.

"Get naked and I'll let you."

I stared at her for a long moment. I could feel the pull of risking nudity for such a great reward while sensing a trap. "You get naked first," I said.

"I thought I had you," she said with a big smile before spending the final fifteen minutes peppering me with lots of questions and not all of them were about sex stuff. She asked if I had ever cheated on a girlfriend, if I had ever been in love, and if I had ever cheated on a test. She received a series of negative answers.

The effects of the potion faded exactly on time and I found myself able to lie to her again. None of the lies were about important things. I even admitted to lying so she would know the potion had worn off.

"Is it wrong that I was hoping it worked on you?" she asked.

"I am hard, if that matters," I said, even letting her see the lump in my shorts.

"I'm horny, too, but it's not the same, is it?"

I agreed. While it felt good admitting my arousal to my sister, the idea of acting on it felt like a step too far. "I wish we had done something last night."

"Like had sex with each other?" she asked.

"Maybe," I hedged. "What about you?"

"Let's eat," she suggested and I wasn't sure how to interpret that. That wasn't a hard "no." Did that mean part of her wished the same thing?

Together, we raided the freezer for crappy comfort food. She ate a couple pizza rolls while I scarfed down a couple White Castle sliders.

"I could try mixing a new batch," she suggested.

"Or maybe you just need to say the spell again?"

Back in the basement after dinner, we explored her remaining supplies and vetoed the idea of mixing a new batch when she pointed out how little she had left of some of the key ingredients. "If we use them tonight, I'm not sure I can get more."

"Let's try the spell a second time and see if that restores what you already have."

We agreed that was a good place to start. After lighting the candles again, she shooed me out of the room. When I asked why she said it was because she had to get naked to cast the spell. I pointed out that I had already seen her naked, but it didn't matter. Knowing that if it worked, I would see her naked anyway, I agreed to wait in the Party Room.

Less than fifteen minutes later, she opened the door and I saw she was dressed again. "I guess you didn't take any yet?"

"I did," she admitted, smoothing down her shirt. "But I still felt funny about being naked." That answered the question about whether reciting the spell was enough to recharge it or not. "I think you should take some, too."

"Really?" I asked, wondering what the point would be. What would be magical about both of us being truth tellers for another forty-five minutes?

"Just do it, okay?" she pleaded.

"Sure," I said, stepping around the drawing on the floor and filling the pipette. When she told me she had taken a double batch, I did the same.

"Anything?" she asked.

"


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