This mistress works hard for her money and it pained her that her slave could waste it and that is why she chose to use her strapon to fuck him in the ass. She wanted him to feel pain and he humiliated and that punishment was able to meet those two requirements for her. She loved it and knew he had learned his lesson even without him saying anything about it.
This guy was asked to check out this mistress' hot body and he did. He was turned on but the mistress was not interested in having fun with him but rather to take advantage of him which she did without caring how he felt. The mistress went ahead to make the guy lick her feet and lick her spit as well and he did it as he had no choice.