Goddess Gabriella did not want to deal with any dishonesty from this guy. That is why she had to make sure that she dominated as well as humiliated this guy and she did it with her spit femdom. The mistress hated the fact that it had come to that but she could not help it as he refused to change and he refused to become honest. So it was on him.
Goddess Gabriella paid this guy handsomely to be her advisor but he did not bring any value to her. She felt that he did not tell her anything new and that his advice was not as good as she had thought it was going to be. So she humiliated him with her spit fetish to get him to pull up his socks. It worked and he changed dug deep to give her better advice.
Goddess Gabriella was out to scare this loser and she wanted to do it with her spit. She chose to use her spit fetish to degrade as well as humiliate him because of how humiliating she was sure it was all going to be. That is why she did what she had to do and why she had to teach him never to piss her off. He learned his lesson.