In the throes of a steamy shower, a curious sister spots her stepbrother's hidden lust for her. Teasing him with a tantalizing glimpse of her soapy body, she playfully dares him to fuck her tight ass. He resists, but her relentless taunts and the sight of her rubbing her sudsy curves prove too much. She spreads her cheeks, inviting him in, and he gives in, pounding her asshole with his throbbing cock until they both cum hard and guilty.