my girlfriend cheated on me with my sister

Well, it's a tough situation. In a light novel, things might seem more dramatic, but in real life, you should assess your own feelings. If she cheated, it's a serious betrayal. You might want to distance yourself from her for a while to clear your head. Think about how important the relationship was to you before this happened. And also, don't blame yourself. It's her actions that are at fault.

But I will try my best to answer.

Coping with the pain is not easy. First, accept that you're in pain. It's a normal reaction. Then, you could try new experiences. Go to new places, meet new people. It might open up new possibilities for you. Also, consider talking to a counselor or a therapist if the pain is too overwhelming. They are trained to help you deal with emotional distress and can offer useful advice on how to move forward.

I recommend the following novels to you: 1. "My Beautiful Landlord" tells the story between the male protagonist and the beautiful landlady. 2. "The Landlord Senior is a Little Otaku": A romantic and pure love story between the male protagonist and the landlord senior. 3. "My 36-year-old Landlady": The life story between the male protagonist and the 30-year-old landlady. 4. "My Beauty's Apartment": The male protagonist lives in an apartment. The landlord is his ex-girlfriend, and his ex-wife lives opposite. I hope you like this fairy's recommendation. Muah ~😗

It's possible, but it won't be easy. She has to be a very forgiving person. You need to be completely honest with her about what happened and why. Then, you need to be prepared to do whatever it takes to make it up to her. It could take a long time for her to trust you again, and she may always have some doubts in the back of her mind.

No, it's not ethical. Kissing your girlfriend's sister is a betrayal of your girlfriend's trust and goes against the norms of loyalty in a relationship.

Well, generally it might be about the complex relationship between the protagonist and his step - sister who used to be his girlfriend. There could be a lot of emotional turmoil, like dealing with the past relationship while now being step - siblings. It might explore how they navigate their new family situation and the feelings that still linger from their past romantic connection.

You're in a tough situation. Loving her doesn't excuse what you did. You need to show remorse. Maybe write her a letter explaining everything - how it happened, why it happened, and how much you regret it. And then, prove your love through actions. Be more attentive, more present in her life, and always be honest from now on. But don't be surprised if she doesn't want to forgive you right away or at all.

It won't be easy. She needs to be completely honest with you about everything that happened. And she has to show through her actions that she is committed to you and the relationship. For example, she should be more open about her whereabouts and who she is with.

First, take some time to calm down. Don't make hasty decisions in the heat of the moment. You could consider having an open and honest conversation with your wife about why she did it, what led to this situation. If you feel that you can't forgive her, then you might need to think about separation or divorce. But if there are factors like kids or deep emotional ties that make you want to work on it, marriage counseling could be an option.