Madam Mysteria felt that this guy was too impatient and she had to do something to him which she did in a cruel manner. He never saw it coming and he wished that he had never pissed her off. But it was happening and he had no choice but to do what the mistress wanted him to do. The mistress had the poor guy lie down and endure her facesitting until she felt it was enough.
Madam Mysteria did not like how disrespectful this guy was being. She had to torture him and dominate him in a way that she had never done and she did it with her facesitting fetish. She had to make it memorable for him and she had to make it painful for him which is exactly what she did. That is why she choked him with her thighs and with her ass as she facesat him.