"Yeah? Worried you might faint on the way back?"

He flicks Ianto an easy smile, bumps their shoulders together a moment as they walk.

"Good thing you got me to escort you. I can put my first aid skills to use if you collapse."

That's absolutely what it is, right? Right. Probably. He adjusts his bag, scanning the road ahead idly, then leans in again and lowers his voice.

"You'll give yourself frown lines."

With all the concerned fussing. So maybe he's not fooled after all.