A brother and sister, trapped in a tiny bathroom, give in to their pent-up lust. The brother, rock-hard and aching, can't resist the sister's lush curves. She, in turn, can't ignore his throbbing cock pressing against her. They kiss, hungry and desperate, as he lifts her onto the counter, spreading her legs to reveal her glistening pussy. He pushes into her, his thick cock stretching her tight hole. They fuck furiously, their bodies slapping together, until they reach their climax, panting and shaking, before hurriedly cleaning up and returning to their roles as brother and sister.