Seriously, Daddy...

It was nap time. Nathan had told me he was tired, and was ready to take a nap. I had to finish something I was working on before reading the story he requested. He came up to me really whiny, and I gave him a stern look as I told him, "just a minute, son." He returned the look, lowered his head toward me and said, "Son. You better get - in - that - bed! I'm serious."