It was abnormal, unnatural, and while many purebloods had married inside their family out of trying to keep the bloodline pure, never would their immediate siblings be involved. Ultimately though, it was not much of a surprise. There were stories, rumors once again passed down by their parents of Tom Riddle having a twin long ago that had disappeared without a trace, stories of the charismatic girl passed on from the first Death Eaters to their sons and daughters. Stories of the loving girl who had treated them with kindness and protected them from her brother's wrath, as well as protecting him from himself, but when she was gone, there was no one to buffer their Lord's cruelty. There was no one to keep him from succumbing to insanity. The girl that was thought to be entirely too close to her brother was thought to be dead, and with her, any shred of humanity that had festered within the Dark Lord's heart.