Look at the Bersa line of pistols. The Thunder Nine looks like just what you're looking for, thin grips and DA/SA. Even the Thunder 380 would be sufficient if she shoots it well(and you can find food for it!). People who own Bersas seem to like them.
Take her to a gun store that has a large selection and let her feel as many as possible. You may be surprised to find how many she likes.