Bianca (Othello) confirms his wife's infidelity. This "evidence" completes Iago's manufactured case against Desdemona, and thereafter Othello is determined to murder both her and Cassio. In 5.1, Bianca arrives just after Cassio has been stabbed by Iago. She reacts with horror and concern. Iago, pretending to have just entered the scene, accuses Bianca of having been part of the group that attacked Cassio. Iago claims her emotional reaction is due to her being caught rather than concern for Cassio and gets her to admit that Cassio ate at her home earlier that evening. Both Iago and Emilia call her a prostitute, but
Emilia (Othello) is presumed his wife is present since Cinthio makes clear earlier in the tale that Desdemona often spent part of the day with the ensign's wife. However, his wife takes no part in the mischief. The next appearance of the ensign's wife in the tale occurs when Desdemona discusses her husband's troubling behaviour with her. Here, Cinthio makes clear the ensign's wife is aware of her husband's plotting, but remains silent in fear of him. She advises Desdemona not to give the Moor any cause for suspicion and to assure him of her love and loyalty. The last mention of