Femdom Blowjob with Ball Slapping and Ruined Orgasm

Description: It's time for a rare treat for my slave. i'm going to give him a blow job! he spends most of the time locked in a tight, pink chastity cage and hasn't felt a warm wet mouth on his dick in a long time. but i'm a cruel bitch and i'm not going to just allow him to enjoy it. this is for my entertainment, so i'm going to mix pain with the pleasure. as he gets close to cumming, i stop and slap his balls, or mix in a few hard knees to the balls. after edging him and beating his balls several times, i allow him to cum, but of course i ruin it and make him swallow his disgusting load!