Emilia vs Iago

In class today we talked about how Emilia really had no intention of giving Iago Desdemona's hankerchief (at least the real one).  There is no way that she could have thought he was going to do anything good with the hankerchief.  I think Emilia just wants to see the good in everyone.  She believes that Desdemona did not cheat on Othello.  She does not realize that her own husband is incredibly evil.  She, unlike Iago, wants everyone to be good and nice, while Iago goes out of his way to see everyone in a negative light.  Emilia is almost the complete opposite of Iago.

Emilia

In class we have been debating whether Emilia is forced to be an accomplice of Iago. I think that in Act 5 scene 2 we learn that we were not giving Emilia enough credit. She personally ruins everything Iago had created by telling Othello the truth about the handkerchief. I never would have thought that Emilia would have been the one to blow Iago's cover. Maybe Desdemona's influence played a bigger role on Emilia than we originally thought. I wonder what motivated Emilia to tell the truth?

Emilia's suspicions

In act 4, Scene 2, Emilia tells Desdemona that "I will be hanged if some eternal villain...to get some office,/Have not devised this slander." Does she realize Iago's plan, since she says that someone devised this plan to get some office (position). If so, is she giving Desdemona a big clue here by saying it? Or does Emilia not realize that Iago is creating this exact plan she is thinking of?