Margaery Tyrell and Cersei Lannister in “Unfinished Business”

Margaery Tyrell

You look radiant, your Grace.

Cersei Lannister

Radiant? Why radiant?

Margaery Tyrell

It's word that came to mind. We're going to be sisters soon, we should be friends.

Cersei Lannister

You're a musical girl, aren't you? I imagine you have a lovely voice.

Margaery Tyrell

A better dancer, than a singer, I'm afraid.

Cersei Lannister

Ah, but you know the song, the Rains of Castamere?

Margaery Tyrell

Of course. They play it so often here at court.

Cersei Lannister

So you know the story of House Reyne of Castamere?

Margaery Tyrell

Not as well as you, I'm sure.

Cersei Lannister

House Reyne was a powerful family. Very wealthy. Second wealthiest in Westeros. Aren't the Tyrells the second wealthiest family in Westeros now? Of course, ambitious climbers don't want to stop on the second highest rung. If only you could take that final step. You'd see further than all the rest. You'd be alone with nothing but blue sky above you. So Lord Reyne built a castle, as grand as Casterly Rock. He gave his wife diamonds, larger than any my mother ever wore. And finally, one day, he rebelled against my father. Do you know where House Reyne is now?

Margaery Tyrell

Gone?

Cersei Lannister

Gone? A gentle word. Why not say slaughtered? Every man, woman and child, put to the sword. I remember seeing their bodies hanging high above the gates of Casterly Rock. My father let them rot up there all summer. It was a long summer. [Quoting "Rains of Castamere] And now the rains weep o'er their halls, and not a soul to hear." If you ever call me "sister" again, I'll have you strangled in your sleep.