My son and his wife are seeking divorce. They have amassed substantial debt during their marriage - most of which my wife and I have paid. We are now close to penniless. If my son and his wife agree and sign divorce papers which indicate that she is resposible for a certain part of the debt to my wife and me, and she doesn't pay, can I garnish her wages? If not, what's the cheapest way I can force her to pay her debt to us? This is in the state of Washington