I don't have any first-hand with KelTec, (but I did mean KelTec above where I referenced the Grendel......showing my age).
One of my USMC brothers is a LEO in WV. He was telling me he carries a Glock 21 for a primary, and a KelTec P11 for a backup. He likes the P11.
I understand about the age thing ,I am over 21 myself !
I never had any issues with the ones I had but like so many guns I have owned throughout the years they were either traded off or sold.
I think that you've been given some good information.
If you decide on the Kel Tec P11, it may well meet your mother's needs.
I've had one for 12 years--it is the hard chrome rig, and it has about 11,000 hours carry time. I don't shoot it a lot, as the square shape in the grip handle hurts my hand when firing 30 or more rounds in a session. It's really meant more for carry than range time. Nevertheless, some guys claim to have run up to 5,000 rounds in their rigs.
Here is a video that reflects my experience with the rig. As in the video, I have the belt clip on the side, and the steel recoil rod installed on my P11 rig.
These days, there are better choices, but you could do a lot worse too...
https://www.youtube.com/watch?v=Ncrh1jUF3uY