“... I have quite a few around the house in various places”
Well, at this point I simply see it like one person liking eggplant and the other hating it. Personally, (whether genetic or societal) men tend to think more about safety for the family than women in a lot of cases. It is admirable in my opinion. She may not LIKE the guns but I bet she will be happy you have them (God forbid) if you ever truly needed one to protect her and your family.
This was always my point with people that don't want to have a gun in the house. If something were to happen and I didn't have the means to protect my family, I would never forgive myself.