The submissive's ass, a canvas of red welts from the intense spanking, clenches and unclenches, hungry for more. The dominant partner, their cock rock hard from the humiliation fetish, teases the submissive further, pushing their cockhead against her asshole, making her beg for it. "Please," she whimpers, "Fuck my ass, please." The dominant partner, merciless, continues to tease, rubbing their cock along her crack, making her writhe in frustration. Finally, they give in, pushing their cock deep into her ass, fucking her hard and fast, their balls slapping against her ass, as the submissive screams in pleasure, her ass clenching around their cock, milking them for all they're worth.