Ruger Security-Six .357 Magnum with a 4" barrel.
If you are willing to send that to her she will be as well served with it as any other gun she could get her hands on. Got my first deer with one at 135 yards in New Mexico a whole bunch of years ago and still wish I had it. It was a great shooter on 200 yard targets on the rifle range and just as handy at the pistol range on Bullseye targets. Even took a rabbit or 3 or 4 or well a bunch of them using 38 spcl wadcutter ammo.
Not real proud of that deer though, only deer I ever had to shoot twice and now I restrict myself to 100 or under but the gun is up to it if she is. It sure made me feel better when I was walking around in mountain lion country.