A femdom mistress, hungry for her sub's cum, binds him to a chair, his rock-hard cock standing at attention. She lubes up a powerful vacuum pump, attaching it to his girthy shaft with a wicked grin. With a flick of a switch, she activates the pump, watching avidly as his cock is sucked and pumped, veins bulging and skin turning a deep, engorged red. She alternates between the pump and her skilled hands, edging him repeatedly, her eyes gleaming with satisfaction as she milks his cock, drawing out rope after rope of hot, sticky cum.