It's not really a body expansion story though there is a small amount of belly growth.
It (and most every story) is at overflowingbra.com
Here's the link, let me know what you think:
http://overflowingbra.com/download.php?StoryID=413
I did write a little known body expansion story that you can find here:
http://www.bodyinflation.org/index.p...ay&storyID=147
Clovis