When it comes to punishing and humiliating guys, no one does it better than this mistress. She knows what to do to each slave. She does not do the same thing to each slave. She customizes her punishments to make sure they are effective. That is what she did to this one as she spat into his mouth. She degraded him by making him swallow her spit and he learned his lesson.
Madame Marissa wanted to find out whether her slave was a liar or not. She had seen what he had done on CCTV and he did not know that she knew. She told him if he did not tell her the truth, she would spit into his mouth. The slave endured being spat on as well as being used as an ashtray but he did not lie. She was impressed with him.