The siblings' secret game of dare leads them to the bathroom, the scent of chlorine heavy in the air. Michelle, her heart pounding, challenges her stepbrother. She turns on the tap, letting the water run, then, with a wicked grin, she starts to pee, the stream arching into the tub. Her stepbrother watches, his cock hardening in his pants. He can't help but join in, unzipping and letting his own stream mix with hers. The bathroom fills with their combined scent, the sound of their piss echoing off the tiles. They're both breathless, their bodies humming with kinky energy, ready for more.