Teach her and do the following in order listed:
1) Proper stance
If you going to use a padded shooting vest....do the following with the vest on.
2) Proper mounting the gun on the shoulder
3) Proper cheek weld and head position.
4) Modifiy the gun to fit her body type if needed
Those 4 will reduce recoil to its minmum for that gun and shell being used
Then start expermenting with lower recoil shells, pads and such
1) Proper stance
If you going to use a padded shooting vest....do the following with the vest on.
2) Proper mounting the gun on the shoulder
3) Proper cheek weld and head position.
4) Modifiy the gun to fit her body type if needed
Those 4 will reduce recoil to its minmum for that gun and shell being used
Then start expermenting with lower recoil shells, pads and such

getting one below that with about 300 shots through her
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