Sora made a frown of...not real seriousness. He went over and sat on Riku's lap. It was better than sitting on the couch anyway. (He did make sure not to block the TV. Couldn't deprive people of explosions.)
"Whaaatever," Sora replied. "Roxas was mean, I tickled him, end of story." Brother things.
Sora poked Riku in the chest. "Riku, I'm on top next time." Just so they were clear.