A. went upstairs to close the windows so Grey would n't be disturbed . He came back , laughing . Apparently my son , who does n't usually object to goofing off after bedtime , put his hands on his hips and firmly told his father , " Stop laughing . It not funny . I trying to go to sleep !

Generate a question about the above context.
Why did my son react the way that he did ?
Available options: i. He was too close to the windows . ii. He did n't like laughing . iii. None of the above choices . iv. He was sleepy and irritated .