Let's do some speculation

About who really has Sydney and why?  I don't believe that either Stefano nor EJ know anything about her whereabouts because they have been acting too tortured, even when no one is watching them.

And Nicole certainly doesn't know anything, despite what everyone else seems to think.  Fay...uh-uh, she's not smart enough to pull anything like that off.  Although I do wonder why she had that wig and baby clothes in her car.

Ideas, anybody?