OP - is she turkey hunting, or turkey shooting?
Not being snarky, but if she's harvested birds with the bolt gun, ask her these questions:
Does she want an upgrade?
If she wants an upgrade, what is she looking for?
If she'd taken birds, and wants an upgrade, but is unsure what she wants, have her try a few.
IMO, shotties are very personal things, (I know that turkey hunting is different than wing or target shooting), and fit is very important, including for recoil management.
If she wants a 12, look into youth models, for shorter length of pull.