The femdom mistress, her eyes gleaming with sadistic pleasure, torments her submissive's balls while she fists his ass. She pushes her hand in, inch by inch, as he whimpers in pain and pleasure. Using his balls as resistance, she forces her fist even deeper, her arm moving in and out, fucking his ass mercilessly. The slave's cries of pain turn to moans of ecstasy as he learns to take his mistress's entire fist.