Bcraig: I bought my mother a Smith & Wesson Model 60 "Ladysmith" in 38 Special about 30 years ago - it served her well (not that she ever shot it in a self defense situation!) but it gave her much peace of mind as her neighborhood (in the Puget Sound area) has steadily declined - becoming more and more unsafe each year.
Pleas for her to "move" to a safer neighborhood were rejected.
I say keep and eye on her when she travels and an eye on her neighbors/surroundings - in other words the revolver she has would/should in all likelihood, suffice for her, forever.
My beloved mother just passed away this late spring at age 92 and again her revolver gave her much peace of mind in her home during her later life.
Hold into the wind
VarmintGuy