Sansa meddles, the bitch.

Arya listened to the dull thwack of her father's hand striking her sister's haunches, and shuddered. Eventually, her father stopped paddling Sansa, and turned towards her. Arya shut her eyes and waited for the blow.

"I-It's not fair!" sniffled Sansa. "I got it on my bare bum, but Arya's going to have her smallclothes to cushion her!"

"That's because you're a stupid slut who doesn't wear any!" snapped Arya.

"Girls, girls!" said their lord father angrily. "This is exactly why..." He gave a frustrated growl. "Arya, lower your smallclothes. You deserve this no less than Sansa."

Arya considered protesting, but nodded, and lowered her smallclothes around her legs. Her father's hand landed with a sharp slap on her rear. "Ow!" she cried.

"Who's stupid now?" said Sansa with a smirk.

"Sansa!" snapped her father, giving her another paddle on the rear. "If you girls cannot learn to behave as sisters, then you will be punished as sisters!" He gave Arya another slap on the rear, alternating between the sisters for awhile.