Othello and Desdemona are married and in Cyprus. Iago engineers Cassio’s dismissal, then persuades Othello that Cassio and Desdemona are lovers. Emilia gives Iago Desdemona’s dropped handkerchief; he plans to plant it in Cassio’s room. Othello orders Cassio’s death, plans Desdemona’s death and makes Iago lieutenant.
Othello demands his handkerchief, saying its loss would destroy marital love. Desdemona cannot produce it and continues pleading for Cassio; Othello leaves angrily. She promises Cassio further help, while Iago goes to find Othello. Cassio gives Bianca the handkerchief he has found in his room, asking her to copy its embroidery.
What happens to Othello during his conversation with Iago?