This guy was too unreliable for these mistresses and they did not want to let him think that it was ok for him to continue being unreliable. So the mistresses used their asses to facesit him and then farted on him as they continued with their thing. He was shocked by what happened and he realized that he had to do what they asked him to do otherwise he would have himself to blame for what happened to him.
This mistress did not want to deal with a guy who was a liability to her. She felt that the guy needed to be taught a lesson and that is why she used her dirty ass to facesit on him and then she went ahead to fart on him. She wanted him to be humiliated and to be degraded like never before and that is exactly what she did to him.