Mizz Thyck wanted this guy to pay her what he owed her. But he did not want to do so and she was tired of always asking for her money. So she chose to dominate this guy with her ass and she did it by facesitting on him and smothering his face. In the process, she choked him and that was when he realized he had to pay her back.
Mizz Thyck does notl like people behaving like imbeciles. This BBW girl did and she had to be punished by the angry and disappointed mistress. She did not want the girl to be used to being one and even though she was also BBW, she had to be taught a lesson. So the mistress degraded and choked her a little using her big ass and farted on her for good measure.
Mizz Thyck wanted to torture this guy with her big ass and she felt that she needed the help of her equally BBW mistress. The two of them had a great time torturing the guy and forcing him to lick as well as smell their asses as well as their pussies. He was told that if he did not do what they wanted him to do, he would be made to endure worse than that.
Mizz Thyck and her friend were pissed at the manner in which this guy did things. He ended up pissing them and they had to teach him how not to do things. They used their big asses as weapons to punish and humiliation. That is why they facesat on him with their bare asses which he was forced to lick and smell before they he was allowed to go after nearly choking.