their parents were in the other room and they were supposed to be doing their homework. but that was so boring. fucking each other was way more fun. until stepsister made a deal that if her stepbrother came inside her he had to do her chores for a week. then the pressure was on,.and boy was it on. so much that it burst inside her. he just couldn't help but cumming deep inside her. but they did manage to stay quite enough to not wake the parents. at least he didn't have to go back to doing homework .....