This is really lovely. I love how you've captured the feel of a small, wordless moment--the particular quality of light, the nuances of Remus' sadness and love--but also situated it so perfectly within the larger trajectory of their stories. I feel like this fic does the same thing for us that Remus is experiencing: it suspends us in a feeling and a moment, keeping everything else right at the edges of our consciousness, still there, but muted for as long as we're reading.