This is a really good bit of work despite not hitting any of my buttons very hard. The girl obviously loves her new endowments and develops a very healthy sexuality that I find appealing.
They wind up huge and deserve their WOW category listing, but unfortunately that means the reader has to like WOW breasts. If you don't, tough. This isn't the story for you. I'm not a WOW fan, but I do like the fun Jessica has getting to WOW. If I have any complaints that do have meaning outside my preferences, it's with the speed of the transformation, and that can easily be marked down as a preference.
This one's short, but the characters-- or the main one since there isn't much room to develop more than one--has some feel to him. Plus, he seems like a decent guy and that's always worth extra points in my book. He doesn't change over the story, but a character doesn't need to if they start out feeling real unless the redevelopment of the character is the point of the story. And it isn't. This story's about other things being developed and expanded on.
TechnicalBeginning, middle, and end and the only certain, obvious and painful grammatical error is the bit at the end that allows us to redistribute 100% intact. I have no idea what I would do with my very own 100%, intact or not.
nicely done, more descriptions of the actual BE and the feel of the growth would be cool. more reactions to the reality of the new breast size is also very sexy.