Errr... I meant even the best marksman should always indicate that he only shot to "stop the threat" and nothing more. I didn't intend to swipe at your skill. Poor wording on my part... Sorry about that...
If you want a semi-auto in your price range, take a look at the Bersa in .380. While the .380 is just below a good defense round IMO, it has the manageble recoil you are looking for- especially in a heavier piece like the Bersa. The Ruger LCP in .380, for example, is a hand-slapper with much felt recoil.
The Bersa certainly isn't top-o-the-line, but I have owned a few over the years and have found them to be very accurate and quite reliable. Decent quality for the price tag.
They do make a double stack "plus" model that holds 15 rnds, but that model isn't Commiefornia compliant.
It may be that the single stack fits your wife's hand a bit better anyway, although the standard mag holds only 7 rnds. (The deluxe mag holds 9, but I have had FTF issues with the 9 rnd mag whereas the standard 7 feeds flawlessly.)
The Bersa fits my wife's hands and the manageble recoil means it isn't uncomfortable to practice with at the range. Having something your wife feels comfortable with and is willing to practice with makes alot of sense.
That said, a fun "range gun" that the wife and I share is the ISSC M-22: a Glock knock off in 22lr. I can use it as a trainer rather than throwing expensive rounds down range, and the light recoil makes it a fun plinker. Several drawbacks to this as a defense gun: Single action only, ammo sensitive, and it's just a 22lr.
Requires a high velocity round with a bullet weight of at least 38 grain. CCI high velocity w/ 40 grain bullet works well as does Remington Thunderbolts in 40 grain. Nothing worse than getting in a pressure situation and having a failure due ammo sensitivity, forgetting to cock the hammer for that first shot, or failing to stop an attacker with an underpowered round.
Good luck with the search!