Mistress Kristina Rose loves to abuse the balls of her slaves and enjoys listening to their cries of pain while she is doing it. With her slave’s head locked in a wooden box and his cock and balls helplessly trapped in a cock board, Kristina has her slave right where she wants him. Kristina proceeds to deliver a barrage of abuse to his cock and balls, including slapping them, hitting them with a wooden mallet, using a sadistic vibrator…