Show her the crime stats for your city/county...this is usually a shoking reminder to how gun protection is a must in this country.
This will prove that you NEED at least a few spare clips to defend your home!
My girl hates guns, and i have about 50, so we just don't talk about it, because neither one of us will bend.
But i'm not married, yet, so things could change.
BTW - I carry my .45 every day, and will for the rest of my life. i've seen too much and will not be a victim to these thugs.