No, your are human. None of us were there, so we can't judge. I'm sure I could have given her an earful too. I'm pretty tolerent, but when the button is pushed long enough, I give it right back. She was clearly in the wrong, and thankfully she admitted it.
The wedding is truly the Bride's day, and the groom's - they should have the most input, then who ever is paying for it should have some sort of input, so they aren't left in an uncomfortable position after the big day is done.
I hope there are no more fireworks. Try and enjoy this special time, take lots of pictures, then when it's all over, take a cruise and relax.