Door shutting. She likes that part of this moment. It means she gets to keep him for just a little while. She laughs very softly against his mouth, almost a sound of relief and gratitude than anything then nips at his bottom lip and runs her hands up his chest to his shoulders, pushing his suit jacket off as she does.

They can be hurt, tortured and killed anywhere. She realizes this even if the Doctor doesn't. All they'll ever have are moments. She'll take those for what they are and hope that one of these days he realizes he doesn't have to be alone.