Bored step-siblings, Michelle and her brother, find themselves alone one languid afternoon. Michelle retreats to the bathroom, her fingers dancing over her clit, her moans echoing softly. Her brother, caught up in his own private fantasy, barges in, cock in hand. Startled, they argue, but the tension is palpable. Later, they reconvene, naked, Michelle's eyes wide at the sight of her brother's throbbing erection. She fantasizes about it stretching her tight pussy, but their encounter is cut short by an unexpected intrusion.