"You may have wondered why I am not a death eater like my sister. I was not asked to join. When bonds are together, they are far more powerful than your average witch or wizard, the magic that flows in one bond, also flows in the other. Before the bonds are sealed, this power can be gained through touch, but once bonded, proximity is enough." She poured herself another cup of tea and continued, "The Dark Lord would not have us fight beside him, I imagine it was in case we turned on him, or his followers. He knows that our mother taught Bellatrix and me occlumency. He knows I might have the power to resist him, however, I have never shown how good I really am, allowing Bellatrix to teach Draco, I feigned having given it up years ago."