Mistress Lola had beef with this caged slave and she had to make sure that he learned his lesson. That is why she chose to use her pee to punish him. He never messed with her after what she did to him as he knew what she was capable of and what she would do to him in the event he tried to piss her off. They never had any issue again.
This mistress was pissed at how her dentist failed to do what she had gone for. He had scheduled her for a root canal but he did not do it well and it failed. She now had to go for another one and since it was expensive, she was pissed that she would have to pay for another one. She was so angry about it that she had to humiliate him by peeing on him.
Mistress Lola did not want this slave to continue being stubborn so she came up with a perfect punishment for him. She tied him and set up a portable toilet. She had his mouth open and she gave herself a pedicure and her nails as well as dead skin from her feet all went into his mouth. As if that was not enough, the mistress spat into his mouth and eventually peed into his mouth.