Bored and alone, a stepsister and brother find themselves drawn to each other, their eyes lingering on forbidden places. They begin to masturbate separately, the tension building between them. When caught in the act, they argue, but the lust is undeniable. Soon, they're naked, the brother's thick cock throbbing as his sister watches, fantasizing about feeling it inside her. Just as they're about to cross the taboo line, a sudden interruption forces them to stop. -