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"She must... be taught... a lesson!” Joffrey screamed, punctuating each word with the heavy fall of his scepter, his voice cracking at the last. “As my betrothed she owes me total obedience!” he looked up defiantly as his uncle strode purposefully toward him.
“And what of your debt, nephew?” Tyrion challenged from half-way across the throne room.
“I am Lord of the Seven Kingdoms." Joffrey sneered. "I owe no debts!”
Tyrion’s leather gauntlet snapped sharply across his nephew’s face, leaving a red mark and an expression of dumbfounded indignation.
“You dare-” this time it was the back of his uncle’s hand, and it came away bloody.
“You were born into debt, my little lordling.” Tyrion said evenly, smearing the blood from his hand on Joffrey’s leather waistcoat. “We all were. Everything we are, we owe to our blood, and our name.” the imp said as he methodically cleaned the boy’s blood and spittle from his hand, and pulled his gauntlet back on. “A name that was old before the Red Keep was built." He offered Sansa his hand as she rose to her feet. "A name that sons and daughters will be born under long after you and I are rotting in the ground.” Tyrion flung the soiled cloth at his nephew who used it to stop the flow from his mouth. “What right do you have to dishonor it- to dishonor them with your cruelty and cowardice?”
"Cowardice! " Joffrey started toward the half-man, but stopped abruptly as Tyrion turned his back to the boy-king.
"You owe a debt of honor to your name, little lordling." He called over his shoulder as he escorted Sansa from the hall. "And if you don't pay it with deeds, you'll pay it with blood." The echo of the heavy doors slamming shut almost drowned out Tyrion's parting words. "A Lannister always pays his debts! "