I'll throw out an oddball
a similar answer to the 1911 9x19 would be the star model b or super b. These could be had for under 200 awhile back, are very heavy/soft shooters. They have the eronomics of the 1911, although the main spring housing is fixed as an arch. They don't have the grip safety. It is SA only and the triggers are pretty good. The action is VERY easy to work. (This is easy to overlook, and may not affect your wife, but I'd make sure she can do this with ease on whatever you decide on).
It's relatively obscure which can be good and bad.
Drawbacks... parts are hard to come by, dry firing is a no-no, resale might be hard if she doesn't like it, probly no way to "test drive" one as they are relatively rare,