Downfall/Move your hip
From Create Your Own Story
You tense your butt and slightly push upwards. The sensation of feeling your cock rubbing against Julianne's ass is indescribable. You push some more until you can't get higher, then let your cock slide down over her ass. You never imagined it would feel this good - science friction, so to speak. You moan and push upwards again, nearly fainting.
"What are you doing?" your mother says. Oh no, oh no, oh my god. She caught you. You are so dead. She sounds drowsy, though; maybe she hasn't realized yet that you. You grasp your last straw of hope and mumble something unintelligible. Your mother repeats her question, and this time she sounds alarmed. You further act like you were sleeping until now and are in the process of waking up, but to no avail. Julianne is your mother, and she knows you too well to fall for that trick.
Gosh, you get a scolding like never before (well, you didn't do anything before that compares to that). Humping your mother - what were you thinking? No hormone in the world could excuse your behavior. The vacation is over; you are sent home and god knows what punishment awaits you.