The Slaves has not being obedient and the Mistress makes an entire argument on this, pushing him around and yelling at him. She even threatens him with a bat, choking him as a lesson, but as he clenches on her for forgiveness, it’s clear as day that she must punish his ass. It would be a shame to get those nice clothes dirty, so she gets in her undies and wrestles the poor slave. His balls have no escape from this, she squashes them with the stiff bat while he’s bent over and moans with pain. At this point, that bat is the only hard thing he has between his legs, his Mistress makes sure that she pushes it as hard as needed to make his balls climb up and stay there. He’s in suffering but she’s laughing and not caring. A hard lesson learned, from all points of view.