I would listen to Myself's points and I would take that one step further. Don't have anything to do with her, in fact get away from her as soon as possible and don't look back.

You can not win against delusional people. You can't.
You can not argue with them, reason with them, use logic or tough love. They will always trump you with misdirection, fabrication, evasion, delusions, guilt trips, false accusations and overeactions. They may turn on you with no warning or remorse during their greatest time of need.

When you interact with delusional people you partake of their delusional state and you will be probably be abused by them, mentally, emotionally and even physically, sooner or later.. It can make you go lose your sanity and emotional stability to interact with or live with other people who have mental illness. You become a victim to their illness, a hostage to their episodes, an unwilling participant in their histrionics and there is no reason to allow that if you value your own mental and physical health and you have any choice in the matter.

My advice is to get out and save yourself.

"And I alone am escaped to tell thee"