In this taboo tale, Mack corner's his curvy step-sister, Katie, in her bedroom. With a wicked gleam in his eye, he commands her to strip, revealing her luscious, natural tits and wide hips. Katie, playing along, teases him with her perfect ass, knowing she's in control. Mack's small cock tents his pants, and Katie takes mercy, giving him a rough, face-fucking blowjob. She dominates, humiliating him, but Mack's appetite grows. He bends her over, slapping her huge ass, and buries his face in her wet pussy. Katie moans, her dirtiest fantasies unfolding. Mack then fucks her hard, just as she wanted, punish her for her earlier taunts.