She has a cute little sister, but not a little brother. He is what is commonly known as a femboy. He has become attached to me and is really cute. Rui, the little brother, shows me his erect penis and seduces me with all his might. I wonder when he realized that I was interested in femboys... I felt excited by the sense of immorality of having sex with him while she was sleeping next to me, and we made love in a place where she wasn't around.