“But Nick was Nick. He knew what she meant when she said, “Oh my dosh.” They could look at an old photo together and travel back in time to the same place; they could begin a million conversations with “Do you remember when . . .”; they could hear the first chords of an old song on the radio and exchange glances that said everything without words. Each memory, good and bad, was another invisible thread that bound them together, even when they were foolishly thinking they could lead separate lives. It was as simple and complicated as that.”