Well ya if I had two shotguns she gets one. But why the heck would I have two shotguns if I think we should have one shotgun and one carbine?However, if you had two shotguns and no carbines, would you take one shotgun and tell your wife "sorry, but we have to have a shotgun and a carbine, so you don't get one." I think you'd hand the second shotgun to the wife.
The carbine and shotgun overlap quite a bit especially with regard to HD. From 5 to 50 yards either can be used with great effect.