Seeking a particular M/ff story

Hi--I'm looking for a powerful story from a couple of years ago; I lost it when I switched from Mac to PC and files disappeared. I'd like to find it because I have an idea for a sequel I'd like to write and would like to correspond with the original author.
The story is about a young woman who becomes obsessed with wanting to see her best friend raped. She hires a guy to do the deed. By agreement he kidnaps them both, ties his client so she can watch and then proceeds to rape the friend.
Does this sound familiar?
Much thanks,
tough93013@yahoo.com