1. look for work somewhere else.
2. report her to the owner of the center.

I can't think of anything else you can do. She obviously has a problem and you cannot fix it. She either needs to be medicated or esle she is undermedicated. She definitely does not know how to work with people. I wonder if she thinks her actions are "normal" or "fair". I can't believe a grown woman would behave this way and have a normal life.

Short of arguing with her (which would only escalate her behavior) I think you and your co-workers should quit and go work for someone who is sane.