Mistress Zephy was not in the mood to talk to her slave as he had pissed her off. So she used her pee to punish him and since she was in a bad mood, he had to do something to lift her spirits and she chose to make him lick her pussy when he was done drinking her pee. And that is exactly what happened and she was ok with him after that.
Mistress Zephy did not want anyone on her team who was ignorant. So she used her pee fetish to humiliate this loser and to make him learn to do things the way she wanted. The mistress also got him to lick her pussy and he did not mind that part. But he definitely knew that she had to be obeyed and he had to start by stopping to be ignorant.
This slave annoyed mistress Zephy and she had to find a way to deal with him. The mistress used her pee fetish to turn the slave into a piss slave. He was shocked as she had never done anything like that to her but from the way she acted, he knew that it was a must for him to do what she asked. So she spread her feet and he drank her pee. But he naughtily also licked her pussy and she did not complain.
Mistress Zephy did not want an ignorant slave but she found herself with one and she was pissed at that fact and she had to make sure there were changes. She forced him to do things her way and that is how she was able to degrade this loser and make him educate himself. He was turned into a human toilet and drank pee a few times until he changed.