I had the same conversation with my wife last December. It seems that I went a little overboard with my gun purchases after November 4th for some reason.
I eventually ended up telling her due to her persistence. She was less than thrilled to say the least. She's ok with me having guns, but
she doesn't understand why anybody would need more than 1 handgun, 1 rifle, and 1 shotgun.
She's right...just like she only needs 3 pairs of shoes, white, black, and sneakers.
With her it was more of a financial thing though. I'm known for getting fired up into a hobby, spending lots of time and money on it, then moving on to something else. She was afraid that I'd lose interest in my guns after awhile. She did feel a little better when I showed her how well they keep their value, if properly taken care of. And I don't ever see myself losing interest in guns.
Admittedly I did spend a lot of money between Nov 4th and Dec. But my gun safe is more interesting now, and each one of my kids has an XDm waiting for them when they get older!
In my experience women just don't ask questions like that out of the blue, they usually have a reason.
There is no such thing as an innocent question. Repeat after me...there is no such thing as an innocent question.
My advice is to tell her how many you have, then tell her why you have that many.
She is your life partner. Tell her.
If it will help, be sure to mention how well they hold their value.
Good luck, and let us know how it goes!
-Plop