Torture her boyfriend's balls to ruin two orgasms

He can only enjoy the handjob but not climax at will. Watch tyrannical mistress with tasty small tits edging his submissive boyfriend with chilling handjob torture. She oils the chap's beautiful big cock and strokes it erotically, but he's not allowed to cum whenever he pleases.
Every time the poor fella nears climax, she would pull a rope tied with expert precision around her balls, and the pain would purposely inhibit orgasm. The evil whore ruins two orgasms but fails in stopping the third. The dude moans in relief as fresh cum shoots from his beat-up cock. Not sure he'll be trying femdom any time soon.