Bagpuss,
My brother was fired when struck with a serious case of depression. The owner's wife was on the Board of Director's of the company and the local Mental Health Organization. There was no compassion. But the wheel keeps turning and what goes around comes around. He is well and working at a better job. They live with their decision. I don't wish anyone ill, nor does my brother. We have been around too long not to know that they must offset the wrong done and he will earn equal negative points if he wastes time on anger or revenge.

Bart is right. Roll with it. When it's over, Guest will have a better job and the confidence of knowing she can change jobs at will.