As Dark as my Blood (фемслэш)

Black is the blood that runs through her veins, black, thick, cruel and maddened. But still, the love there was real, as was the desire. Everything could get out of control and Black madness would appear, but even madness was controlled when it came to Fleur Delacour.
Or, the one that Hermione is the daughter of Tom Riddle and Bellatrix Lestrange, is dark and cruel, except with Fleur Delacour, with whom she has a mild controlled obsession.