JJsqueeze
Dad, Husband....legend
in addition to what others have said, and I agree with it all, I would encourage her to have more upright posture and try to get her not to slide her hip out of the way of her arm. Getting her hip to close to about 45 instead of opening more/bending a little to clear the arm will teach her the lower body feel that goes along with this part of the motion. You might be able to get a two for one fix while you go through these progressions to fix the whip. go 9ers