A man I know in my previous city wanted a gun and his wife was against it. He finally told her he had one after it had been in the house for 3 years. I don’t recommend that method.
I will echo a lot of other people and say you should take your wife for a gun safety course and get her used to it.
I don’t currently own a gun as I don’t feel I need one. But there was a time I did. I made sure I knew how to use it.
And finally, I would recommend that people see the video “Innocents Betrayed” which was produced by Jews for the Preservation of Firearms Ownership. It’s about various governments that enacted gun control laws and what happened after.