Kneeling before his Mistress, the slave's gaze is fixed on the floor. She presents him with a set of ballstretching weights, each one heavier than the last. His balls, already engorged, begin to swell even more as she slips the first weight onto his sack. He grunts, his cock twitching, as she adds another, then another. His testicles hang low, swollen and sensitive, as she finally removes the weights, leaving him breathless and eager for her next command.