.38 special wad-cutters aren't intimidating for petite ladies, especially in a handgun with the additional weight of a .357.
Finally, they're about the safest weapon around. When the cylinder is out of battery, they're safe. It's that simple.
Mark
Again, I know nothing about handguns- How is it you can fit a 38 caliber cartridge in a “.357” handgun? Can you use standard .357 cartridges and magnums in the same gun?