If you want to quietly prove its the indian not the arrow, for the next cage BP session have her hit w/ a whipit bat. The conclusion that a kid can hit is unavoidable if they can hit with a ball on a rope.
Good idea. Or maybe find a wood bat. That would do it.
An old tennis buddy of mine had a long winning steak against me and bragged that he could beat me with a frying pan. I eventually got good enough to where he needed a real tennis racket to beat me.