Lady Cary was pissed that this guy was not attracted to her. He did not want anything to do with her and that was not ok with her. She felt that she had to dominate him and teach him a lesson and that is why she opted to torture as well as humiliate him for what he had done. The mistress did not care what he felt and all she did was to humiliate him before she chased him away.
Lady Cary did not care that her boss was into her. She wanted to milk the situation and make good money for herself, invest it and then quit. So she used her hot ass to do it. The hot and sexy mistress teased him with the hot ass and got him so turned on that he agreed to do her a few favors that helped her make money from the firm.