If she's a little surprised -- that he does at all, and that it's an option Luther keeps in his options now, after what happened -- there's some part of her that reminders her he's still in her doorway. He's still there, and she's even in the conversation that's a part of it. Even if it's at a hard angle from where it all started, now that they are in the same space suddenly. But she didn't say either of the things she did because they were easy, or even because they might not trip things up, but because they had to be said.

Overlooked too long, even if they were too big to ever be said more than lightly.
Even if it's at odds from anything exactly direct, he's still here, and he did offer.

Up here or down there?