Hmmm...this is a hard one. One would think that the marriage contract would expire once one has died, but zombies are not really dead, so legally speaking, we have a legal obligation that has not expired. So, as a fact, we don't marry as per say -we are undead not stupid- (been there done that kind of thing), but if you were married as a zombie, then the fact that you become a zombie does not dissolve the marriage (rats!).
Now...as a zombie we get more demanding than when we were just plain boring humans. Zombies like clean houses, even though we are never home. A good wife MUST keep the house clean and neat just in case that we decide to come back home. Lazy women are not acceptable, sorry.