Sokka doesn't give Ouka a chance to answer, and thereby prevents Omi from trying to stop her. Them's the breaks.

He keeps a hand light on Toph's upper arm and starts to walk.

"We've got some housecleaning for you to do," he says brightly. "Only it's bigger than a house."

His life has been saved by metalbending before, and he's not about to see it disrespected.

His words come out formed by his vicious resigned grin.

"But in order to do this, we're going to have to break Gran-Gran's number one rule. We're going to have to do something against all the known rules."