Quote a passage where Iago is disrespectful to his wife.

In faith, too much.

I find it still, when I have leave to sleep.

Marry, before your ladyship, I grant,

She puts her tongue a little in her heart

And chides with thinking.

Iago says that his wife will never shut up and constantly nags him about things he thinks and says. He says he can't sleep! (Act 2 sc.1)