I feel for you Magoo!
At least she is open to the firearm as a tool of self defense. Now all you need to do is mold her properly. There is a series of steps people who are positive with guns go through very similar to the four awareness stages (unconscious unaware, conscious unaware, conscious aware and finally unconscious aware). As people evolve in the firearms world they are ignorant and appalled, ignorant, ignorant curious, ignorant accepting, ignorant know-it-all, educated know-it-all, educated, learning.
Sadly, on both sides of the evolutionary ladder people can be very obnoxious.
Hang in there, and teach her slow and steady.