Cersei Lannister: Why did Catelyn Stark set you free?
Jaime Lannister: What?
Cersei Lannister: I've been wondering for months. Ever since that great cow brought you back to the capital. Why did she set you free?
Jaime Lannister: You know why. She'd hoped I'd send her daughters back to her.
Cersei Lannister: She hoped or did you promise?
Jaime Lannister: I swore by all the gods that if her daughters were alive, I'd return them to her.
Cersei Lannister: So you made a sacred vow to the enemy.
Jaime Lannister: I wanted to get back to you. Should I have told her to fuck off?
Cersei Lannister: You didn't mean it, then? You have no loyalty to Catelyn Stark?
Jaime Lannister: Catelyn Stark's dead.