Hey I know you posted this story ages ago, so long that you've probably forgotten it, especially seeing as it hasn't garnered any reviews, which I find very lamentable because this was marvelous! No really, I enjoyed this one-shot. I particularly enjoyed the POV of the great-grandmother's portrait. Narcissa was pretty spot-on and I think you explained her very well. Besides that, the execution was excellent, not too frilly, good characterisation and combination of action and dialogue.
Bravo, I say!