Where was Draco? She'd told him to go away, to leave her alone after he all but admitted that he betrayed her to Rodolphus, but did that mean he actually listened? And what was his role in the whole ordeal to begin with? Rodolphus considered him family even though there were no blood ties. He cultivated an alliance with the Malfoys when no one else in their society even wanted to look down their noses at them. Desperation could turn even the most docile of animals into dangerous enemies. Someone along the road should've considered the very real possibility that the Malfoys could become a problem if they were ignored and humiliated for long enough.