Sorry to hear this. Can I ask why she wants a divorce?
Sorry that this happened to you.
My folks got divorced ten years ago, and it wasn't a fun time. There are still hard feelings.
Everyone in this thread has jumped on the OP's side and has crucified his wife. Although I agree that her timing was really, really not nice, please keep in mind that there are two sides to every story.
Getting an attorney is a good idea regardless of fault.
One good piece of advice I could lend: don't be petty about possessions (meaning don't say you want something just because she does- just to spite her). It just drags things out and makes everything way worse than they need to be.
Good luck.