If you are limiting your ammo supply according to what the wife says, you have already lost the battle.
My wife is clueless as to the exact amount of firearms and ammunition I have and I can assure you, she is happier that way.
I can relate to this. Oh honey i didn't know those were in the back of your closet, how long have you had them? since before we were married Dear what is in all those green cans stored in garage and basement. Oh little ammo,ect