Pure of Heart and Poisoned Mind

Toujours Pur. That was the most important rule in the Black family. The Noble and Most Ancient House of Black was always pure. A daughter of the House of Black was never to associate with muggles, mudbloods, or half-bloods, lest she be blasted off the family tree. A Black was to marry a man of respectable status and continue the pure bloodline. A Black was to obey her family no matter the consequences, because without your family you are nothing.

Crossposted on AO3 under same title and username