I have to say if you're suddenly disinvited, after being invited by name (and being the wife of the Bride to Be's father), there's some very serious trouble going on. And if she's talking about "crashing" the wedding anyway, it sounds like it was caused by her, originally.
Of course, a couple of centuries ago, the great would have solved this by sending her to a dungeon for a few decades, if not to the block. However, we *are* more civilized today, although the existence of the yellow press might argue otherwise.