I didn't like yesterday

Sunday was not a bad day, it was just a normal Sunday - very busy but not excessively busy. Monday was the problem. Unbeknown to me MegaMouth had a bad day on Saturday - fortunately, I didn't see her on Sunday so it wasn't until Monday that she became annoyed with me. What did I do to deserve her wrath? Come to work was enough.
For some reason she thinks she is a manager and tries to behave like one. The problem is that chronologically she is an adult but mentally she is only 10 and a school yard bully. Her life must be so empty because all she cares about is picking on someone - she has worked her way through members of staff. Regretfully, our manager has tried to put her in her place but she is not dealing with someone normal but someone with a host of problems, in particular, her lack of interpersonal skills. She is not able to talk to people - any person. Yet she is put in charge of people and even those both customers and staff have, over a long period of time, reported her to their managers and personnel, nothing is ever done.
It isn't fair because anyone else would immediately get the sack but not her. She is unbearable to work with. Your worst nightmare!
So Monday, she was more of a problem than she is normally because of the row she had (in front of a customer) with another member of staff and she also missed out seeing male strippers because she had to work.
I don't wish ill luck to anyone, but her. She is pure evil!!!!!!!!!!!!!!!!!!!