My friend fucks my stepbrother and I masturbate while watching them.

Every afternoon when she came home from school she was tired and ready to rest, but during the last week there was something strange. From the hallway came a rumor of strange noises, which she couldn't quite understand. One day her curiosity got the better of her. She discovered that it was the door to her stepbrother's room, fortunately it was ajar and what was her surprise to see the boy naked on her best friend, the girl who had told her that she could not accompany her home because she was busy on a date. The pleasure she experienced at the image surprised her completely.