Femdom mistress unlocks chastity sub, treats him to edging and a ruined orgasm

Rod is restrained on the bondage table and it's a release day so I unlock him from his chastity cage ready for some fun. I take great pleasure in stroking, licking and edging his cock to an almost but not quite orgasm and at the end I trick him into thinking he might get an orgasm but squeeze the base of his shaft tight at the last second to stop the flow of cum from erupting and ruin his not quite orgasm. Unlucky.