Perhaps we would have left and defected to the Order of the Phoenix, despite our deep distaste for what they stood for, except we had you. We would not risk your death, or even if you were protected, our deaths, leaving you to grow up without us. And besides, we still believed in blood purity, we merely no longer trusted the Dark Lord not to turn on us. And we wanted to believe in the dream; that you could grow up in a world where pure bloods held their rightful place, and you would have to serve no wizard or witch with lesser blood than yours.