I feel it would be best to at least have a "safe" word with your spouse. You wake up to a loud noise and grab your gun to go investigate, she grabs hers and takes cover in the room. Upon approaching your room again you shout out your "safe" word and that way she knows the dark figure coming through the bedroom door is you and not some no go scum.
Just my $.02
Practice doesn't make perfect, it make permanent.
When I hear a Liberal say "I can speak for gun owners because I own a shotgun" I just want to scream "Well I can speak for vegetarians because I like lettuce on my cheeseburger!"