The LCP has a nasty kick to it due to the narrow backstrap and light weight. The trigger is pretty poor too. It's not a fun or pleasant gun to shoot.
Good call on the small 9mm. I'd take my G26 over a LCP any day of the week in terms of shoot comfort, firepower, and reliability.
For mom, check out a S&W 640 (stainless J-frame Centennial) or Ruger SP-101. If she wants something a little bigger, S&W has a 686 3" listed on their site. It's an L-frame with a hammer.
For used stuff, there are a few K-frame snubbies that S&W made.