In the throes of a heated argument, a horny step-sister and brother find themselves drawn into a web of taboo desire. Michelle, irritated and sexually frustrated, begins to masturbate in the bathroom, only to be caught by her stepbrother. Their fight escalates, but so does their mutual lust. Naked and aroused, they decide to masturbate together, Michelle's eyes locked on her stepbrother's massive cock. Just as they're about to cross the final line, an unexpected intrusion forces them to abort their incestuous encounter.