"I'm just cleaning," the brother claims, his dick in hand, as his sister enters the shower. But she knows better, her eyes widening at the sight of his engorged cock. She can't help but stare, her own body responding to the taboo allure. She turns, giving him a full view of her ass, her fingers trailing down her crack. He watches, jerking off openly now, as she bends over, her pussy on full display. They don't touch, but the air is thick with their shared lust, their bodies yearning for more.