Newlywed 15??

So I've heard of the Freshman 15....what about the newlywed 15?? I went to put on the same dress I wore a mere few months ago to our rehersal dinner and was astonished at what I saw. I'm bound and determined to still wear it, consider it motivation. The darn thing did still manage to zip up, though I may not be able to breath for the next few hours.....