A horny brother and sister, bored and alone, find solace in self-pleasure. She fingers her wet pussy, he strokes his thick cock, each trying to be quiet. But when he walks in on her, they argue, and later, decide to masturbate openly in front of each other. Naked, she takes in his massive dick, fantasizing about it inside her. Just as they're about to act on their mutual yearning, someone enters, forcing them to abruptly end their erotic encounter.