A dominant mistress takes control, her skilled hands manipulating a powerful penis pump. She slides the clear cylinder over a throbbing, uncut cock, sealing it airtight. With a slow, steady pressure, she activates the pump, watching in satisfaction as the engorged member swells and pulses. She milks the cock expertly, bringing the bound man to the brink of orgasm, only to back off and start again. Finally, she releases the vacuum, allowing a torrent of cum to erupt, coating his abs and her skilled hands.