Im 24yo male, my sister is 22yo. When we were kids, we had an episode where we were curious about each other. We were into kissing and touching, what's probably not normal, but we were kids so maybe it wasnt so sick. At least that's i want to believe. But now i am fantasizing about sex with her. Even when we are at the lake in the water having fun, i don't move away when she, maybe by accident, touch my crotch. I want her to do that. Sometimes we are lying on the couch in weird positions and suddenly my palm is between her legs or under her breast and she's not moving, like its nothing. In these moments it turns me on, but later i feel guilty and think that something bad is sitting in my head. Sorry if my english isnt petfecy, its not my first language