Mistress Dula wanted to show her friends how to fist and she chose to teach them at the expense of this guy who had angered her. He had to endure the punishment as all the mistresses tried it on him and one of them even went after his balls and he squeezed them hard. The guy was in the kind of pain he had never felt before and did not even know was possible to feel.
Mistress Dula and her friend had been conned by this guy and they had to torture him for all that he had done. He had to learn that it was wrong to do what he had done and so they went out of their way to make him endure the pain of their ass fisting. They fisted him in the ass and they made him feel pain he never knew he could feel.
When this guy tried to blackmail mistress Dula, he regretted it when he realized that she was not the sort to be blackmailed. The mistress cruelly turned him into her bitch and she fisted him in the ass. She made it a painful affair and made sure that he learned his lesson the hard way. He cried, begged for mercy and told the mistress he would never repeat his mistake. The mistress agreed to let him go.
Mistress Dula was pissed on learning that this employee had been embezzling funds. She was so angry and disappointed that she had to punish him. She used her fisting fetish to punish him. He was in pain as she did it and he begged her to stop while promising to never do it again. She did not stop as she wanted him to feel even more pain and never be tempted to do that again.
This mistress is very strict. She does not mess around with slaves and losers especially those who misbehave. When she realized that this guy was misbehaving and he was doing it to sort of spite her, she could not take it and had to take matters into her own hands. That is why she chose to fist the shit out of him and she did it cruelly for it to be a lesson.