Let her feel and fondle a 4" Ruger SP 101. Heavy enough to sorta tame the recoil of a .357 full-house load, but not bad for holster carry.
5'-2" and 120 pounds is not delicate, but at 5'-2" there could be a problem with hand size vs. a pistol's grip size. Try a Smith K-frame as well.
My wife carries a S&W 640 in 357....(I think 640 is right..It has a short barrel..but I think they make a longer barrel now)