Game of Thrones, Season 5

Cersei Lannister:
Uncle Kevan! In light of your position as Commander of the Lannister armies, it would please the King if you would serve as his Master of War. No man living better deserves the title.

Kevan Lannister:
That is kind of you to say. I would like to hear it from the King, himself.

Cersei Lannister:
The King is very busy at this moment.

Kevan Lannister:
He should be here, learning what it means to rule.

Cersei Lannister:
He is learning. On this occasion, in his capacity as ruler, he's asked me to speak on his behalf.

Kevan Lannister:
I return to the Capital to pay my respects to my brother, and to you, and to serve the King. I did not return to the Capitol to serve as your puppet, to watch you stack the Small Council with sycophants! Sending your own brother away so he won't...

Cersei Lannister:
My brother has left the Capitol to lead a sensitive diplomatic mission.

Kevan Lannister:
What mission?

Cersei Lannister:
That is not your concern as Master of War.

Kevan Lannister:
I do not recognize your authority to dictate what is and is not my concern. You are the Queen Mother. Nothing more.

Cersei Lannister:
You would abandon your King in his time of need?

Kevan Lannister:
If he wants to send for me, I will be waiting for him. At Casterly Rock.