Yeah, that is an issue, but the best gun is the one you have on you when you need it. And she will be more likely to carry what is easiest to carry rather than what is easiest to shoot.
At the same time she is much more confident around wheel guns than pistols, so my Kahr is kind of off the table. Not to mention that the 9mm kicks pretty well in the little Kahr and she hates shooting it (unlike the CZ 75).