The Seeds of Suspicion
The act begins with Cassio attempting to regain Othello's favor by asking Desdemona to intercede on his behalf. While her intentions are purely virtuous, Iago uses this proximity to his advantage. He ensures Othello witnesses Cassio leaving Desdemona’s company, subtly suggesting that the exit looked suspicious. This sets the stage for a masterclass in psychological manipulation, as Iago uses Othello's own insecurities against him.