Self Service Alumni and Employee Address Updates

I received an interesting question from our Advancement office this afternoon:

We audit our spouse relationship addresses to make sure they match in the database. When we pull a list of spouse addresses that don't match, most are because the employee or alumni updated their own address. When they do so they don't have an option to update their spouse's information in the database. Is it possible to set it up so that if an alum or employee updates their own information, then their spouse's information also updates automatically? Or is there a way to place a checkbox that they could select to indicate that their spouse's record should match as