On a different note, my wife and I went through the NRA First Steps training course yesterday...
That's outstanding! Glad to hear it went well and you are looking at some different options to help your spouse find a firearm she can use comfortably.
Warning: thread drift follows...
We tried the KelTec Sub2K for my mom too, but the location of the bolt handle made it awkward for her to manipulate easily. The 'backward' operation of the crossbolt safety was another issue, my mom mostly shoots a Marlin Model 60 .22 that has a conventional crossbolt safety and having the safety on a less often used defensive gun backward in its operation bothered me. My wife dislikes the fact that the bolt handle reciprocates when the gun is fired, it bothers her having the bolt handle running back and forth under the stock tube.
I on the other hand like the Sub2K a lot, and wound up adding a factory accessory light rail and a stock tube cover from Blue Force Gear. I drilled out the rear sight aperture to .25" to make it quicker to use for me. I also got some Glock 18 magazines, which hold 30 rounds each. They're about as long as the standard factory fore-end on the carbine and a couple of them along with a standard magazine in the pistol grip make a defensively useful yet very compact package.
...end thread drift...
Keep training and practicing, and Stay Safe,
lpl/nc