"Thank you."

He follows her inside, waiting until the door is fully closed and they are a distance from it before speaking again.

"You've been keeping yourself busy." It's an observation, not a question. He's familiar with what it looks like on a person, if mainly himself. It is at least something of a relief that she has not allowed herself to be dragged down by what happened or Kal-El's decision to stay imprisoned for the time being.