A very touching and believable piece about a pairing I have never seen before but would definitely read again. I particularly liked Rufus' background jealously of Minerva's feelings for Albus, and the way they came to the crunch after the Potters' murder. I also liked the way you foreshadowed the harder traits in Rufus' character when he was still relatively young and carefree, and as others have already said - the way that Minerva was true to herself throughout. There were some very droll lines, too! I particularly enjoyed:
Minerva was willing to concede that she might well be happy. She exhibited all the standard symptoms...
I'm also very curious about the revelation at the end that Rufus left behind a widow. It definitely throws the Rufus/Minerva relationship into a different light upon realizing that it was always an extra-martial affair! To whom was he married???