A voyeuristic sister can't help but watch her brother pleasuring himself, his thick cock hardening in his hand. She joins him, rubbing her pussy through her panties, her eyes locked on his. She commands him to touch her, guiding his hand between her legs. He obeys, his fingers slipping inside her wet heat. She grinds against him, her breath hitching as she comes, her juices coating his hand. But this is just the beginning of her lesson in dominance and submission.