Mistress Tatjana and her friend laughed their butts off when this guy tried to fuck them. He was crass and he was not their type. But he did not know that and he ended up pissing them off. The mistresses humiliated him and they did it as cruelly as they could to make sure that he would never try that sort of nonsense on other people especially ones he did not know well.
This guy felt that she had to dominate this guy and do it in a way he would never forget. He was full of himself and she did not want to work with someone like that. That is why she used her saliva to torture the guy and to humiliate him. By the time she was done with him, she had managed to have fun at his expense and to make him change.