River took a preparatory breath before speaking. "Don't answer if you can't, but when did you first know that I loved you? From your point of view?"
The Doctor's hearts ached, and he turned to lie facing her. "The first time I looked into your eyes, I could see it there."
Her face dropped, "I don't like to think about the first time you met me."
Nor I, thought the Doctor. "That was the day it started for me, when I first began to—" River silenced his lips with a finger, so he kissed her instead. It didn't need saying.