Cassio did top her; ask thy husband else.
O, I were damn’d beneath all depth in hell,
But that I did proceed upon just grounds
To this extremity. Thy husband knew it all.
– William Shakespeare
Othello, Act 5, Scene 2. Addressing Emilia, Othello argues that he had just cause to kill Desdemona on the grounds of adultery. Emilia’s husband Iago knew all about her cheating, he tells her.