She is bound to the bench and works against her restraints and the clamped vibrator as she cums.
The pussy fucking makes her cum so hard, it only is fitting to test out how much she can cum from anal sex. The machine fucks her ass with incredible, moaning, response.
Her final test is the powerful Sybian which she can barely handle. She has to use her own drool that leaks from the metal gag to wet her clit so the machine can slip over her pussy and get her off.