As Verticoli wrote, she's going to have to grow into it. He'll have to ease her into the transition from paper targets and that poised stance type shooting to defensive training and shooting, in his own way. Going from just plain old enjoying shooting to some serious regimented personal defense is a whole different mindset.
Just throwing up a paper silhouette target at 7 Yards and then getting into a description of center mass target shooting, along with head shots, two shot drills and all the stuff us old folks take for granted, scares the heck out of some more gentle kind of people.
I go to the local ranges some times, run a target down range about 7 yards. Then I start slapping holes into center mass and head shots. No Marquis of Queensbury Rules,no thrills or frills, just serious stuff. I have gotten some interesting questions from some folks who recognized what they were seeing and were not amused. Sure I go target shooting a lot but other times it's strictly business.