"But I'm already comfortable here," Sam pointed out reasonably. And if he pressed closer to Tony when he turned to face him, well, that was a complete coincidence and had nothing to do with anything.

"Mm." Now that his brain was fractionally more awake, he mulled the situation over. "I had a latte, and I got drowsy, and...I wanted-" He broke off there, looking a little embarrassed. "Yeah, it's nothing to worry about. Everything's fine."

Except for the part where he'd wanted to cuddle up to Tony. That might have been somewhat less fine.