This mistress was pissed off by her friend as her friend had done some bad things which he knew not to do. She did not want to let him off the hook and that is why she did what she had to do. That is why she went out of her way to make him eat her shit and drink her pee. He had no choice but to do it and to apologize.
Mistress Anja needed to degrade this guy and she did it with her pee. She had to make sure that the guy drank her pee and that he learned his lesson. The mistress chose to pee on him because she knew that he would not forget what she wanted to do to him. He cried and begged her for mercy but she did not let him go. She had fun at his expense and degraded him like she wanted.
Mistress Anja did not care where she was. All that mattered to her was that she had fun and that is why she chose to use her piss femdom to have the time of her life. The mistress did not care who saw her do what she did as she removed her trousers and peed in public. It was fun for her and she enjoyed what she did before she went on her way.