Lady Shay felt that this guy was giving her perverted vibes. She asked him to stop but he did not. She decided to humiliate him and there was nothing he could do about it. The mistress used her pee to humiliate him. And before she humiliated him, she managed to tease and deny him for her own fun then had him drink her urine. He was then warned against any perverted behavior.
Lady Shay discovered that one of her employees was unreliable and she could not let it go. She had to do something about it and that is why she chose to pee on him and to degrade him. She forced him to drink her urine and then gave him a chance to redeem himself. If he did not change, then she would fire him. He changed as he feared being sacked and being peed on.
Lady Shay was interested in this guy drinking her pee and so she used her piss femdom to teach him to drink her urine. The mistress was not bothered with what the guy felt as all that mattered was what she wanted as that was what had to be done. So she scared him a little and got him in the right frame of mind to do what she wanted before giving him the tutorials.