A brother enters the bathroom, catching his sister in the throes of self-pleasure, her body writhing as she fingers her wet slit. Instead of being shocked, he's intrigued, his cock hardening at the sight of her. She tries to cover herself, but he's already seen too much. "Let me help you with that," he says, his voice low and commanding. She hesitates, then nods, her body aching for release. He pushes her back against the wall, his fingers replacing hers, stroking her clit until she's bucking against him, her orgasm ripping through her. But he's not done yet, pushing his cock into her, fucking her hard and fast until she's screaming his name, her body convulsing in pleasure.