Searching for an old story?

I am trying to find a body expansion/breast expansion story. It was old, probably from about 2001 or so? The main character's name was Ann. She was like a volunteer for some kind of experiment or something. But when she gets shocked she slowly starts growing. Like she is growing but not inflating, she grows huge while the two doctors rush her to the largest room, an operation room. While they do, they try to squeeze her through the double doors but her massive breasts smash against the top of the doorway and she screams in pleasure. They get her there and Ann decides she wants to grow massive and she fills the whole operation room? I can't remember the name or who wrote it sadly.