Under the guise of sibling rivalry, a brother and sister secretly crave each other's touch. Michelle, bored and frustrated, masturbates in the bathroom, only to be caught by her stepbrother. Their argument escalates, but so does their tension. Naked and horny, they decide to masturbate openly, Michelle's eyes fixed on her stepbrother's massive, throbbing cock. Their mutual desire reaches a fever pitch, but a sudden interruption forces them to abort their incestuous plans, leaving them panting and unsatisfied.