Attend a CCW class together. If you have your permit you might can take a refresher course from the same place at no charge.
There is so much more involved in CCW than just getting a permit. I went with DH to the class because I wanted to see just what he was getting himself into. As our instructor said over and over, once that trigger is pulled you have a lifetime of emotional, physical and financial responsibilities to deal with. Not just for you but for your family and friends. Don't scare her but she should know these things. I felt it was my responsibility as a spouse to be educated in all the aspects of owning a gun. Throughout the course many of the myths about gun ownership was put to the side. I read and heard many comments from the people that attended on how the gun played a role in their daily lives. It was very educational and I left that day feeling like I was ready to take the step to prepare myself for whatever comes. I think its very important for spouses to have the CCW. I first decided to take my CCW course so I could see what my husband was getting involved in and if for no other reason if I was sitting in our car alone for whatever reason with a few guns it would be legal. So its not always about being able to carry but some really good educational gun advice.
Along with the CCW permit, we now belong to a gun club and routinely practice our gun skills. Our gun club you had to take a gun safety course to join. Again very important and learning from someone else often works best. Safety safety safety! Not far from my daughters home someone cornered a women in a discount store in the middle of the day! Not far from our own home someone shot the driver of a car stopped at a red light with his wife and children in the back seat. This person was running a few blocks from where the police were after him. A NICE part of town I might add. Things happen, just read the newspaper. I'm forever thankful that my DH brought me to that class and is in the process of preparing me to take care of myself if need be. We were never involved in guns growing up nor were we when our children were small. That was then, this is now. I've given mace to my daughters for years. When they're ready for the next step we'll be there to help.
I still consider myself hesitant with firearms. His baretta scared the ... out of me! Start with something lighter. My p238 Lady (my bling gun) is about the easiest thing around, racking and recoil. This takes time and my DH is very easy going about what I will and will not do. I must admit there is a SLIGHT competitive thing going on with us. Doesn't hurt that my first few rounds are dead center

Someone said find other female shooters, excellent advice. Check out a variety of ranges and ask if they have a womens night or events.
And remember, when its time for her to get her own gun, take her shopping! It has to be what works for her.
Good luck!