S&W 442 Airweight .38 Special P+
Shooting +P in that air weight it has more felt recoil than a .45 Glock.
Get that young lady out shooting!!! If presented with a number of options to shoot, it won't take long and she will be able to tell you what SHE wants to carry.
My wife's pistol is a Gen 3 G26. I recently let her shoot 6 different 9mm pistols with the same type ammunition and she shot her old G26 best so no change for her any time soon.
She has not shot my Gen 3 G21 lately and asked why I did not bring it for her to shoot. Together we shot 9 different 9mm pistols and that was enough pistols to clean in one day.