This role-play is performed by adults. When I was comforting my younger sister who got dumped, I suddenly got an erection because she was so defenseless! I was thinking to myself that my sister had an erection, but my sister said, ``You got an erection when you saw me? I'm so happy! Your brother likes me after all, too?Then let's have two children,'' and the younger sister devoured his erect penis. When I refused thinking it was a bad idea, I was attacked while I was asleep and forced to cum inside my sister.She went straight to school and spent the whole day with my sperm in her pussy, and even after I got home she kept coming at me.