How much clearer can the evidence be? Before flush: stones in the gallbladder. After the flush: no stones.
What you presented as evidence is like saying because you can find Easter eggs on Easter this is proof the Easter Bunny exists. I posted on other posts that sludge can appear as gallstones. And this can be cleared up by ingesting oils. But this is not the same thing gallstones, and unless you can show an analysis showing that what she did pass were true gallstones they you e absolutely no evidence. What is evidence are the actual lab analyses that have shown repeatedly that what people are passing are saponified olive oil and/or sterol-cholesterol complexes formed in the intestines.
Anyway, you can't deny that the flush can remove Gallstones from the gallbladder. A fatty meal can remove gallstones from the gallbladder, so naturally a flush can do that.
If the stones are tiny enough. The quarter size blobs and larger that people are claiming are passed gallstones are clearly not real gallstones.