A popular method of torturing victims is "Hot & Cold". The combination of ice and hot water breaks every will.
After he fucks her she has to kneel on the floor with a blindfold and suck his cock.
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.