Tad, MLC aside, try to remember this when this happens, and you feel sucked in and all confused, and your emotions start to rise.
Look at the situation for what it is. Look at how she's handled it from start to present.
Look at how you've handled it.
How many oppurtunities has she had to straighten up and act maturely about all of this?
I think there comes a time that for anyone that has one ounce of maturity or rationality left inside them, they will realize that and can see the big picture for what it is.
I don't see her understanding the big picture here, which she can't because she's really out there now. And really it is very sad to see someone going through what she is.
Detatchment is the hardest, and when you have consistent contact like that, it will really hinder your ability to move forward. It is the hardest thing you will ever do. But subjecting yourself to her emotional and mental abuse over and over again will just keep you stuck.