A sadistic mistress takes control, manipulating her submissive's penis and testicles with cruel intent. She expertly milks his cock, coaxing it to a rigid state before positioning it for relentless, rhythmic slaps. The force sends waves of pain and pleasure through his body, his moans echoing her dominance. She varies her technique, sometimes gripping his balls, other times striking his shaft, always pushing him closer to the edge of endurance.