Not to be an echo, but I am so sorry that happened to you. Still, I think the fact that you are limiting her influence on your life is a great and brave thing. It took me a long time to step back from my dysfunctional family, so you have my admiration.
As far as her last jab, don't let it get you down! You will be a beautiful bride, no matter what! Funny, I just posted something about wedding dresses and being fat, saying how I don't want to be a "fat bride". But at the end of the day, as long as your love sees you as the most beautiful person in the world, it doesn't matter if you wear a potato sack to your wedding as you will look beautiful! Love does that to people. So please remember that you are beautiful at whatever size you are and pick a dress that makes you feel like a princess.