Trapped together in an empty house, a curious brother and sister can't resist exploring their taboo desires. She tentatively touches herself, moaning softly, while he listens from the next room, his cock hardening. Caught in the act, they argue, but the tension is palpable. Later, they reconvene, naked and nervous, as she tentatively strokes his thick shaft. He pushes her back on the bed, her legs spreading eagerly, as they lose themselves in a passionate, forbidden fuck.