@End Of All Hope: Girl has sex with in front of her brother, who's going too far with his skinship. Well, in the end, she still goes to have sex with him too... I'm guessing brother *wanted* to feel cuckolded in the first place.
@bggm: Oooh, so I think I already read this. She asks a friend to have sex with her because her brother touches her too much, they have sex in front of him and then in the end it's revealed he is a cuck. *looks up for it*, yup, it came out on fakku. But I'm sure I already read an identical story a little back then.