In the throes of boredom, a brother and sister find themselves drawn together, their incestuous desires awakened. She fingers her tight, wet pussy, while he strokes his massive cock, both trying to remain quiet. Caught in the act, they argue, but their lust is undeniable. Soon, they're naked and masturbating openly, their mutual desire palpable. Just as they're about to cross the final line, an intrusion forces them to abort their taboo encounter.