I'm going to expose my cheating ex in work
Why do you want to expose her at work specifically?
Because she's a bitch who cheated on me with a coworker.
I get your mad, but it's wrong to bring personal issues into a workplace. All your coworkers might get really annoyed.
It's okay. I want to share the drama with all my coworkers.
I just think you are better off leaving everyone one else out of your situation. The fact that she cheated is really just between you, her, and the person she cheated with. All her coworkers do not have anything to do with it.