So this is just a counterpoint given by some random chump on a gun board but if I may:
I highly recommend AGAINST purchasing a revolver for a female shooter unless she's the sort of shooter who's already into and proficient with revolvers.
Revolvers are orders of magnitude more complicated - both mechanically and operationally - than autos.
Their limited capacity requires their shooter to be more proficient with their operation than do shooters with autos.
The FBI has compiled statistics showing that in 80+ years of data collected on firefights that only 19% of rounds expended actually strike their targets.
Therefore for a five-shot revolver, you're looking at a less than one hit per all five rounds expended.
These same statistics have stated that one-shot kills are by far the norm, with many gunshot wound victims requiring several center mass strikes to be neutralized.
A revolver is more complicated and requires more fine motor skills to reload than does an auto and thus requires extensive training to assure a fast, consistent reload. And with the above point about hit ratios explained, the shooter WILL be reloading a revolver in any given gunfight. It is to be expected.
Now given these points, I reiterate that I would recommend against giving a revolver to a female shooter unless she is:
I. Willing to train.
A. Willing to train on the high-power defensive loads which as a guy who carries a small revolver can tell you, ain't pleasant on the hands when firing.
B. Willing to put in the thousands of repetitions required to be able to reload a revolver from a speedloader or speedstrip, while under the stress of a live-fire situation in order to stay in the fight.
II. Willing to carry.
A. Revolvers are considerably heavier and bulkier than small autos.
B. Revolver speedloaders tend to be bulkier than spare magazines.
and III. Willing to use the thing.
Now I'm not here to talk you out of buying a revolver, but these are the points I give to anybody who wants to buy one for their wife/girlfriend/daughter what have you as they tend to think that a revolver is a much simpler affair for a carry gun than an auto.
It's my opinion as a layman who's taken a few defensive pistol courses, as a salesman who has sold a ton of handguns and as a revolver aficionado myself that you purchase a polymer-framed striker-fired or DAO auto in the 9x19 caliber.
There is nothing wrong with the Glock 26 or Kel Tec P11 (or PF9) for a female shooter. I gave my P11 to a female friend because I felt that since she wasn't willing to put in the time and dedication on training with the revolver her ex had given her and that she'd be best off with a DAO auto (and I just happened to have one laying around).
Now if your wife is the sort of person who sits in front of an open youtube window and shadow-apes Jerry Miculek as he's loading and unloading in that amazing super-fast way he does, then by all means get a concealed hammer Smith and buy her tons of Bianchi speed strips and keep her loaded with Gold Dots.