So the other day when I (M21) took my half sister (F45) on a four wheeler ride I was able to feel her tits pressed up against my back. Well, ever since that day, I have not been able to stop thinking about her unfortunately, I don’t have any sexy pictures of her or any of her clothing to jack off with, but I still can’t help but to just imagine to have sex with her. what’s even worse though is I really want to see her get fucked by another man (preferably a BBC). I don’t know a lot about my half sister. but for some reason, I just want to imagine her as a huge slut. I don’t know why i think of her that way but it turns me on so much.