What elevates the story out of the MOTW category into something rarer is that scene at the end, with Mulder playing the piano and Scully looking on, as she comprehends at last what drew Mulder to the case, and to Sarah.

yes, i agree. it was definitely a fic that started off good but mild, and built on itself right up until the end. i really love it when a writer manages to do that. it's subtle and feels very natural and poignant, without really seeming to try.