Bored siblings Michelle and her stepbrother find themselves alone, their hormones raging. Michelle retreats to the bathroom, her fingers dancing over her clit and ass, trying to muffle her moans. Her stepbrother, overhearing, bursts in, catching her mid-act. They argue, but the tension's shifted - Michelle's gaze lingers on his stiffening cock. They decide to masturbate openly, Michelle's eyes widening at the sight of his thick, throbbing tool. She fantasizes about it stretching her tight pussy, but their moment's interrupted by an unseen intruder.