If you want to, you could take up reloading and make her practice rounds weaker. (It's a great excuse to get into reloading.) If you can find an indoor range that sells their own reloads you might be able to talk them into making you up a special batch.
Although someone SHOULD make weaker practice rounds, sort of cowboy loads in 9mm? If all else fails, I've found Winchester White box to be the weakest factory load IMHO.
I THINK Taurus is making a revolver in 32 H&R Mag. If so, she could shoot 32 longs or even 32 shorts for softer recoil.
Good luck,
Gino