These two teenagers are staying over at a friends house while their parents are away. The teens are a brother and sister. The sister needs to take meds to help her sleep. One day she discovers that while she was asleep someone took her virginity. She lets this go on for a while. She thinks it's the father of her friend and finds that kind that the older man is having sex with her while she is sleeping. But once she finds out she is pregnant she finds out that it wasn't the father of the friend. But it was her brother and possibly the brother of the friend. Or just her brother.