From my experience 5 years ago. Yes, get a good DIVORCE attny. I'm far from a lawyer, so this "advice" is from my experience only. TRY to keep it civil with her until it's over.

WA is a community property state. Any assets and debts incurred by either party is the responsibilty of the married parties. I foget what it's called, but you need to "file" a notice that from this day forward you're not responsible for her new debts (ie her spending money on a new car, credit cards, etc). You'll have to get the house appraised, and then one of you will have to "buy" out the others equity (maybe trade for other household assets, or sell the house and split the proceeds).

I'm sure others will offer better advice. Sorry to hear.
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..."the clock looked at me just like the devil in disguise"...