Novel plot? Possibly too far-fetched to bring back to reality?

I think it has potential. It has a good story line. It kind of reminds me of She's Come Undone by Wally Lamb very vaguely. It needs a lot of work and such. You could use the model's image- it isn't like she'd know it was her if she ever read it. People are into romance novels, obviously. They're one of the most bought genres of books. Anyways. You could always try writing it. If you don't like it after a while, then discard it. There's no harm in trying. It does have a chance though. Once you write some of it, post it. I'd read and critique it. Good luck and don't give up!