Cersei: The man who murdered our father, he tore us apart. He's the enemy. I've been telling you for years, you've been defending him for years.
Jaime: This is exactly what they want.
Cersei: And now our father is dead, and that little monster is out there somewhere drawing breath. Did you set him free? Tyrion may be a monster, but at least he killed our father on purpose. You killed him by mistake, a stupidity.