Lady Cary noted that this slave was used to doing things his way instead of her way and that was not ok with her especially when his way and her way clashed. So she had to make him learn that her word was final and that he was never supposed to contradict her or disobey her. So she cruelly forced him to endure a lot of pain and humiliation for him to learn.
Lady Cary loves to tease and deny. She has a gorgeous ass that she uses for that purpose. She never misses an opportunity to do so and today she did it to her slave after she had caught him sniffing her panties. She knew he was into her and he was horny so she teased him with her ass and she denied him because she knew he would go and jerk off.