Do what I do, wait til she's not home, then sneak it in and put it in the back of the safe. Then when she is home, drag it out in front of her, and if she ask's "is that a new gun"?, just say naw, this is an old peice of junk that I drug out of the back of the safe and by the way you look lovely today dear, and may I have the pleasure of taking you out to dinner tonight?
