My wife didn't drive when we married, but after a couple of attempts, she didn't like it when I tried to teach her. She paid for a driving school to teach her, and surprised me with her driver's license.
My daughter is now 17, and doesn't yet have her permit. I have a feeling that I'm going to need to pay again for driving school. I did teach my son, although I distinctly remember yelling "Curb, CURB,
CURB!" as I was watching my passenger wheel coming perilously close one day, with the entire family in the car. Do you think that my daughter remembers that?
My wife has allowed me to teach her to shoot, however (after she attended ScouterRick's excellent Basic Pistol course). I second the recommendation for a Women on Target or similar course, as well as befriending another
couple who likes to shoot together. If there's another lady making your wife more comfortable with both the proper knowledge, skills,
and attitude necessary to become a responsible gun owner and shooter, she may develop the necessary respect for handling guns.
Good luck!