In the throes of sibling rivalry, Michelle and her stepbrother find themselves alone and bored. Michelle retreats to the bathroom, her fingers exploring her wet pussy and big ass, trying to remain quiet. Caught red-handed by her excited stepbrother, they argue, but later, they decide to masturbate openly in front of each other. Michelle's eyes widen at the sight of his thick, straight, huge cock. As they act on their mutual desire, someone's entrance forces them to abruptly end their intense, taboo encounter.