http://www.tfproject.org/tfp/showthread.php?t=48270
This is not really a new issue for you two... It's a very sensitive topic for both of you, and you need to find a way to come to a happy medium. I'd say that this is pretty normal for a first year of marriage.
How much weigh has she gained in a year that you went from thinking she looks great to being turned off by her...