My solution to the "wife factor" was a bit different.
When I first started dating my wife, I taught her how to shoot a pistol. That was our second date. That date was also when she found out I carry a gun.
She's been shooting ever since and has her own concealed handgun license. She shoots rather well with my Browning Buck Mark .22, and has also done well with a Smith & Wesson model 64 .38 spl. and a Beretta 92FS. We are still looking for something she would like to carry and good ways for her to carry it, but that will come.
So, her understanding of my shooting, and carrying a gun, and buying guns, isn't a problem.