  What they didn't know was that Alecto carried a very large grudge. In fact it took all of her Occlumency from lashing out and attacking everyone in the room. Filius she had forgiven a long time ago. Her brother tricked her into joining the Death Eaters, something she didn't even want to join. She would not deny that she loves hurting and killing people, she was almost as sick as Bellatrix and on par with her for dueling.