revolver post, something ammo-related comes to mind.
The lady in question had picked up some Winchester .38 Special +P hollowpoints some time ago, and they were a big part of her problem with being spooked by the pistol: the muzzle flash was bothering her. Big, impressive flash in the range, but that was Not a Good Thing in this case. With some different ammo, much less flash, much happier lady.
A lot of people don't realize it, but not only are the brand names and bullets different between brands, powder is. And some produces a lot more flash than others. The Gold Dot ammo I've fired has all had a minimal flash; this Winchester and some Remington hollowpoints the worst I've seen outside of some 7.62x25mm. And it is a real problem for some people.
So here's another point of ammo selection, if the stuff someone tries has to much flash for them to be comfortable with, try another brand. May be all that's needed to get them over the hump.