Naked In The Dark

Deb is offered a drug at a party, one which will make her breasts bigger. She's bored, so she takes it.
A week later she's hugely bigger, and her breasts keep growing until she's top-heavy and none of her clothing fits.
There's an antidote, and her friend Chloe says she'll get it, but she's acting strangely, almost as though she wants Deb to be too enormously busty to stand up.
Linda, who's moved into her old place, says she's going to have milk, and lots of it.
Deb panics and escapes, but now she's locked outside, naked, miles from home. It's dark, and dawn is coming.
Can she make it home? Is Chloe on her side or not, and who can she trust? How big can she get and still be able to stand?
How long can she go before she has to be milked?