Share some of the more general stories in a group setting, so they get their curiosity satisfied in a proper way.
Tell them clearly that this kind of behavior makes you uncomfortable and violates your family's privacy. If they are real friends, they will understand and stop. If not, you should distance yourself from them. You can also make it clear that any stories related to your wife in a private way are not for sharing or amusement.
First, you can try to communicate your discomfort with this interest. Let her know that such content makes you feel uneasy and that you prefer more positive and healthy topics in your relationship.
Well, this is a rather tricky situation. Start by observing the nature of her teasing. If it's just light - hearted and friendly banter, you might just need to have a gentle chat with her about toning it down a bit. But if it seems more flirtatious or inappropriate, it's crucial to have a serious talk. You can tell her how you value your friends and your relationship with her, and that this kind of behavior can cause problems in both areas. You could also suggest some new social activities where she can interact with your friends in a more positive and respectful way, like group outings or hobby - based get - togethers.
You could quietly approach her and cover her up, then take her aside to talk privately.
First, you should have an honest conversation with your wife privately. Explain to her how uncomfortable and inappropriate this behavior makes you feel. Then, you might also need to have a talk with your friends, making it clear that such behavior is not acceptable in your relationship.
Another option is to look at old photos or videos. Sometimes just seeing the visual of what was going on at the time can jog your memory about a great story. Maybe there's a video of a friend trying to do a magic trick that went horribly wrong. And this way, you can share these stories with your wife without causing any discomfort to your friends.
Talk to your wife. Let her know that while you understand she may be curious, your sister might need some privacy. Just be straightforward about it.
You could try to find a middle ground. For example, if it's part of her fantasy world, see if there are ways to incorporate elements of it in a more acceptable way within your relationship. Maybe through writing private stories together where you can both have input and control over the content.
Another option is to share her interests. If she loves reading, you could mention how she has introduced you to some great books, and how she often organizes a small book club among friends. This way, your friends get to know her better in a positive and respectful way.
Stay calm yourself. Don't raise your voice or show any signs of anger. Just talk to her in a soft voice, like 'Hey, this isn't your place, let's go find your mommy or daddy.' Then walk her back to her home.