As other poster have mentioned have her shoot a variety of guns but have her do so with someone besides you; you dont want her reading cues from you as to what she thinks she should pick up. Someone you both respect and is competent.
Having said that you mentioned bear country, zombies and it being an everyday carry CCW. Based off of that without knowing what training your wife has had and will complete after getting a gun or having seen what your wife looks like, stature and build wise I can only recommend one type of pistol.
I would say go for a .357 magnum snub. Make sure it is all steel not a light weight alloy model. The .357 magnum is great for backpacking, even in a snubby. For practice or even every day carry you can load up some decent .38 specials.
If your wife does not practice a lot then a revolver tends to be much simpler to operate under stress (point, squeeze, repeat...). A snubby is also really easy to conceal (especially the 5 shot models) and more affordable than the sub-compact/micro pistols.
I am recommending the steel models because as wonderful as dropping weight off a EDC piece is I have seen (I am an NRA Instructor) enough women instantly hate a .357 in airweight after using full power slugs; even though their husbands thought they were doing them a favor by getting the 2 ounce model. The all steel are heavier and absorb recoil so much better.
I am recommending the .357 caliber just because you can cross between the .38 and the .357; both good rounds.
My .02¢ only