Arizona return would show all of H's income and all of W's income until W moved -- then half of what W earned in CA since it's H's.  CA return would show all of W's income after the move and half of H's income after the move.  Usually the resident state allows credit for nonresident taxes paid, but AZ and CA are weird, the nonresident state gives credit for tax paid to the resident state.  I would tell them to go away and don't come back until they both moved to Nevada.

Or Texas.