"If you're sleepy, let's sleep for a little longer; shall we?"
"Yes! Youyou wants to sleep with mommy!"
She promptly carried him to bed, covered him with a blanket, and tightly hugged him.
Nestled in her embrace, his little hand touched her skin, but it was wet and sticky. He frowned in disdain. "Mommy, you have a lot of sweat! It stinks!"
She pretended to be aggrieved and cried out, "Baby, you find mommy stinky?"
"Hmph! How will Youyou despise stinky mommy?" The little guy yawned, unable to hold out any longer.
He did not tell her that, in fact, for the past two days and nights, he had never properly closed his eyes. Worrying about her and fearing that she would feel cold from kicking off her blanket were, of course, only part of the reason for his loss of sleep; he was mostly thinking about things.
As for what was on his mind, he naturally would not mention it to her.