I saw the ending coming (spoiler)
I figured out that she must have been in on it almost from the very start. I knew there was a twist and that was the only one that instantly sprang to mind. That there was no picture of her on the company web site bios was a clue.
And that no raped woman (or any other rape victim) would refuse to call the police if something like that had ever happened, jealous husband or no jealous husband. Enspecially if nothing had actually taken place during an interrupted one night stand.
As a matter of fact, I thought that other characters might have been in on it, too. Such as Winston or the police officer relative.
If you see enough movies, you can see practically every developement coming.