Dear OP,
I feel for you. The thing with being very accommodating, which you clearly are, (and that isn't a fault, btw) means you will sadly attract CFs of the highest order.
ANY way you had stood up to yourself, with or without involving other parties, would have resulted in F1s utter outrage, as you have suddenly lost that most favourable quality which allowed her to leech off you.
Contrary to some pps' opinions, these are CLASSIC narcissistic behaviours. People with a social conscience DO NOT behave this way. Would you? Or is this anathema to you, as this thread confirms it is to most people. The self-pitying, attention-seeking fb status really underlines this. A bully called out turns into a child.
You have been sorely used. The plus side is you will now most likely see her type coming a mile off.
In the meantime, try and put it out of your mind. No good will come of any further input from you, and rest assured your conscience is clear.
