He first punishes her nipples and then turns on the vibrator.
Now a vibrator is attached to the chair. The slave should have several orgasms.
Her hands are handcuffed and now he ties her legs up on the chair so that she has to sit really uncomfortably.
See a bikinigirl gagged and cuffed with an armbinder for more. If she knew what will happen next, she probably wouldn't have done it.
It just hurts to be tied to a saddle like that. How long does it take?