Slave is almost completely drained, but I am sure I can milk one more orgasm out of him before locking him back into chastity. I tie him to a cross and use a cock pump on him to get him hard again as he writhes and moans. Holding the glass which already has multiple loads in it, I milk one last orgasm out of him, draining his balls completely. I push him down onto his knees on the floor of the dungeon and instruct him to swallow down all of the cum I've milked out of him, letting him know he has to pay for the privilege of being allowed to orgasm.