If this is her first firearm or she is not familiar with the recoil you would do best to follow MJL's advice.
I think way too much thought is put into special ammo, and not enough though is put into shooting fast and on target, or under stress.
Buy her a couple boxes of wadcutters, try the FMJ ammo, work her up to whatever SHE feels comfortable with.
Train her to shoot to stop and to shoot from cover whenever possible.
Make barriers between her and the aggressor.
Try to minimize standing isosceles in front of a pie plate at seven yards.
(Good for an NRA instructor's basic course, bad for practical application.)
Located at American Legion post 300, somewhere in Northern Michigan.