SD, Reading your posts, it just irritated the heck out of me that your W was continuing her A, spending your money, not working, spending little time with the kids, etc.
Don't let her threats get to you. Do what you have to do, be matter of fact, get your ducks in a row and be prepared for some ugliness for awhile. It will happen but you must remember that it was "her" actions that have pushed you to this point.