Oh, then wouldn't you have watched it already? Stacy knew about Fred being a guardian angel for Jane, but it's against the rules so he went back to 'heaven'. Since Fred didn't actually exist as a human, all traces of him were lost (or erased on purpose, it's been a while, I can't remember it well) so Stacy never knew Fred. After Fred gave up his angel status, he came back and lived...somewhere (Jane put Deb's apartment up for rent since Fred left) and then he moved into Jane and Stacy's place when he started dating Stacy. So technically, Stacy doesn't know that Fred knows about Jane being Deb currently but she did at one point.
Last edited by Kudaranai; 11-03-2011 at 08:26 PM.