This may be a dumb question, but if she's in her mid fifties and has not ever shot a gun (my take on the phrase "absolute newbie to firearms"), what is the rush to get her to carry concealed? Why not go through a bunch of familiarization first, allow her to develop her own opinions on firearms and what feels "right" and then pop the question (you know, "Which one will it be, my darling?")
My opinion is that if she must absolutely carry a concealed weapon in short order for whatever reason, get her a couple of intensive training sessions and a Glock 17 or 19 - they're inexpensive, and work really well. From there, she can form her opinions and will probably want to ditch the Glock at some point in the future.