Iago that Desdemona is having an affair with Cassio. This plan occupies the final three acts of the play. He manipulates his wife Emilia, Desdemona's lady-in-waiting, into taking from Desdemona a handkerchief that Othello had given her; he then tells Othello that he had seen it in Cassio's possession. Once Othello flies into a jealous rage, Iago tells him to hide and look on while he (Iago) talks to Cassio. Iago then leads Othello to believe that a bawdy conversation about Cassio's mistress, Bianca, is in fact about Desdemona. Mad with jealousy, Othello orders Iago to kill Cassio, promising to make
Emilia (Othello) comparatively minor character for much of the play; however, she serves to provide a strong contrast to the romantic and obedient Desdemona, demonstrating that she is both intelligent and distinctly cynical, especially on matters relating to men and marriage – her speech to Desdemona listing the faults and flaws of the male sex in 4.3 is a good example of this (though she does admit that women also have "frailty, as men have"). She also states in the same scene that she would be willing to commit adultery for a sufficiently high price – this shows her cynical and worldly