The Overflowing Bra

Reads like a boy's wank story. "...and then her clothes fell of[sic] and she had an orgasm. The End."
HOWEVER!
On a more positive note, the writer appears to have at least a grasp of spelling and grammar; I've seen far worse than this. And while it's quick and pedestrian, each sentence picks up from the last, and there is a narrative flow of sorts.
If this writer really puts his mind to it, he can probably come up with a much better story. He's got potential.

Wha? 

This seems like the work of a junior high student who doesn't proof his work and was trying to hammer this out while watching something on television.

A nice fantasy but a rather poor execution. Short, stilted, and rather abrupt. Lacking any real description, and totally without any actual "content". I'd encourage you to keep writing, but in the furute spend more than one evening on your work and actually care about the final product as more than the remnants of your own -ahem- "fulfillment".

Too short, poor descriptions, the changes themself were interesting enough but the twins themselves weren't really utilised very well. Ending was pretty poor too.