In the quiet of her room, a curious step-sister hears her brother's hushed moans. Intrigued, she peeks through the door to find him sprawled on his bed, his hand working furiously over his stiff cock. She watches, entranced, as he edges closer to release, his body tensing, his breath coming in short gasps. Just as he's about to come, she lets out a gasp, alerting him to her presence and shattering the moment.