My lord, that was too much. You should apologize.
I didn't do anything!
You unfaithful whore!
Oh, I must've mistaken you from the sly Venetian whom I married then.
Heaven knows I'm not a whore. I never cheated on you!
Heaven have mercy on me!
Say your last prayers, Desdemona. You're going to die
What have you done to her, you devil!
Act 4 scene 1 continues. Lodovico and Desdemona came with a letter from the Duke. The Duke wanted Othello back to Venice and appoint Cassio as the new governor of Cyprus. This made Desdemona happy, but Othello wasn't happy about it and thinking they were having an affair, Othello slapped her.
My husband!? He shall rot in hell then!
She was unfaithful. Your honest husband told me. So, I killed her.
In act 4 scene 2, Othello tried to make Emilia and Desdemona confess. He wasn't able to get anything from them and he started calling Desdemona foul words.
In act 5 scene 2, Othello finally decided to kill Desdemona. He told Desdemona to say her last prayers and he gave her a kiss because she was about to die. Even though she said she didn't do anything, Othello continued to smother her with a pillow until she died.
I kissed you before I killed you. Now, I'm dying and I'll kiss you again.
What a tragedy this night was! It's all your fault, Iago! You shall be punished!
Desdemona woke up momentarily and told Emilia that she killed herself. However, Othello admittedly killed her for being unfaithful. He also told her that Iago was the one who told him Desdemona was having an affair with Cassio.
Emilia revealed the truth that she stole Desdemona's handkerchief and gave it to Iago. Iago killed Emilia and tried to ran away but was captured.
Othello stabbed Iago but he was able to survive and his sword was taken away. He regretted killing Desdemona. As reconciliation, he stabbed himself and kissed Desdemona before his last breath.