you were sitting on your bed reading till all of a sudden your friend little sister came in the room and sit besides you, she looked like a baby so you didn't mind her but then you felt a touch on your shoulder, you turned and faced her, you followed where she was pointing her finger till... her pants a big ass bulge between her legs

"unf!"

she handed you a note wich said

"sorry if im hard im probably just thinking about my brother and his fat ass, you can help out if you want, but I'll masturbate alone if you don't want to"