Hey there GD. Been keeping up with your sitch just haven't had much to offer these days. Sorry to hear that the STBX is turning for the worst.
Like others stated, take care of your kids but I wouldn't offer to do anything else for her unless for some reason its required by the courts. As you have stated in the past you can always give to her in the future as acts of goodwill.
Hope things don't get too nasty. She needs to remember you two share children and keep their best interests in mind. Sorry to hear she is being immature and selfish.
Sounds like my hasbend...totally selfish right now. But oh well. I can only worry about how I conduct myself.
Me: 30 EX-H: 37 DD: 5 Separated 6/07. MC for months, EX-H quit MC. Divorce Final 8/14/08. Trying to move on with new life.