If you haven't already, maybe you should be asking your wife about this too
Find out how your wife feels about having a gun for protection.
Talk about the use of a gun in the home for protection.
If she agrees that you need a gun at home for protection, develop a plan together on how best to employ it.
Have a light for the gun, have a phone for the gun too.
Take classes with her. If she doesn't know how to use a gun for protection yet, show her how serious you are by having a third party teach BOTH of you. This way there is no difference in what needs to be done when something goes bump in the night. You are both operating on the same sheet of music.
If she's not a shooter already ( and from the way you worded your question, I'm guessing she's not) it's a good idea for an instructor other than you to teach her. This way, if she doesn't take to shooting right away, she won't resent you but might not like the instructor for a while. The best way to avoid this is to get a good instructor, perhaps a female cop/ ex-cop.
You're a shooter, she might not be. You have a better chance of adapting to her needs than she does of yours in this situation. Heck, you're over a foot taller than her. You should be able to handle a little .32 (if that's what she choses).
tweeter, Mosul