If she's not getting "tilt", maybe change the cue? Call it a side crunch?
I've used a hitting stick (the flexible fiberglass rods with the ball on the end) across the shoulders to help show how the shoulders, hands, and barrel stay aligned. IIRC, I started at contact, than showed how I would reach progressively lower balls, not by bending the knees, but by "tilting". The longer hitting stick (or pvc pipe, broom handle, whatever) helps them connect the dots, if you will, b/w the shoulders, hands, and bat.