Sandra Parker, the disobedient sub, is back for her third lesson in submission with Frank Gun. This time, he's focused on her ass, using it, abusing it. He starts with a brutal face-slapping, leaving her eyes watering. Then, he binds her arms behind her back and forces her to her knees, presenting her ass. He fucks her ass with his fingers, hard, making her yelp. He slaps her pussy, making her clit throb, before attaching a pump, watching as it fills with blood. Sandra begs for his cock, and Frank gives it to her, shoving it into her ass, making her beg for more as he fucks her hard and rough.