ORIGINAL: Pa_Sniper

If she is a small framed person,a semi auto or ported barrel 20 gauge.BUT take her to a range and rent a gun for her to shoot.Try a 12 AND a 20.See what she thinks.
I started a friend off on a NEF single shot 20.My mossberg 12 almostt knocked her over.A 20ga pump would be best.But try several at a range first.