Did she give any reasons for her decision? Maybe have her try a Taurus Tracker. The ridiculous difference in barrel length may make her think differently about things. Have her put it in her purse, take it out and put it back while in the car. I think the Tracker would be like trying to use an over/under shotgun in the car.
Concealed weapons are the size they are for a reason, portability and maneuverability. (It is definitely not for looks. Four inchers win there.)
I love my Airwieght. I am not a revolver type, but that is the firearm that is ALWAYS on me. I don't suggest that for a new carrier though. They, like myself a few short years ago, are hung up on how it shoots. Which is pretty harshly. A heavier, nicer shooting firearm gets them in the "mood", so to speak. A human won't want to carry if they are unpracticed, practice is easier when it doesn't hurt the pinkie.
Had I seen one first, I would have bought a Lady Smith for myself. Gorgeous gun, sized just right, wood grips, stainless steel for durabillity and recoil absorbtion. No, it's not a girls gun, her name is Lady!
New carriers are not thinking of the daily dead wieght that will be hauled around. Not so bad for a female with a purse though.
Keltec makes a thirty two auto-loader. The atp, p-at, ...pthree... Well at any rate, it is light and holds more than five.
My P-32 has a 13-shot extended magazine. I would still recommend a .380 and only half of my Kel-tecs are reliable. I added a Kel-tec extension to their extended magazine. I guess they don't make the ones I have anymore but they do have a 10 rd magazine for the P-32.
https://www.keltecweapons.com/quickview/index/view/path/p32-37-10rd-magazine-223
That said I would sure recommend a .380 or 9.mm loaded with light rds (115 gr. Gold Dot). If Sig get's it together on the p365 that would be my choice.
Winchester makes a 105 gr. 9mm:
https://ammoseek.com/ammo/9mm-luger/-handgun-105grains-
Here are a few great resources for women CCW:
https://thewellarmedwoman.com/
https://www.gungoddess.com/
https://ammo.com/articles/womans-self-defense-guide-concealed-carry
https://www.pewpewtactical.com/7-best-handguns-women/
http://www.wideopenspaces.com/6-best-self-defense-handguns-women/