Emily’s Balloon Fun by Ladyboy2008 (Archive Link)
This is probably one of my most favourite belly-inflation stories I’ve ever found. The story follows Emily and the few days she has the home to herself. She intends to have quite some fun for the time and prepares everything in the bathroom. Inserting a balloon into her womb and inflating it as far as she can manage, she simulates a fake-pregnancy.
This story is probably the one that got me hooked on the entire belly-inflation stuff.
The story was also somewhat continued by meaney-mean-me3.