Post Orgasm Torture with a Cock Head Shaking Device drives this restrained Slave crazy

The slave is already prepared. His arms and legs are tied and spread, his cock locked in a chastity cage, simply waiting for whatever his Step Mom has planned. And today will be tough for him. First, she starts sucking and jerking his cock to get him hard, but only for one reason: tying a rope around his cock and balls to prevent him from getting soft again before the final treatment. And this will be hard for him. She uses a cock-head shaking device to make him orgasm quickly and then to deliver post-orgasm torture. What a painful procedure … milking his cock steadily even after he has finished his orgasm.