In the dim light of the bedroom, a brother and sister, their parents away, find themselves drawn together by an undeniable, taboo attraction. He watches her as she changes, her body ripe and inviting, her eyes meeting his in the mirror. She catches him masturbating, his cock hard and throbbing, and instead of leaving, she joins him, their mutual desire palpable. They explore each other's bodies, their hands tentatively touching, their lips meeting in a forbidden kiss. He fingers her tight, wet pussy, making her moan, while she strokes his thick cock, bringing him to the brink. As they move towards the inevitable, they're interrupted by a knock at the door, forcing them to hastily separate, their hearts pounding with fear and exhilaration.