Don't worry about the escalation - you'll be blue in the eyes if you try to see what her motivations are.
As everyone has said, when you get the papers just make sure you have a L look em over and get their advice.
As it is said here quite often, divorce is just a piece of paper. Don't let that deter you from DBing and continuing to improve yourself and make a life worth living - for yourself.
Don't worry about it until you actually get served. and I like East's suggestion on how to handle the interaction if she actually shows up.
