Jack should have been listening more carefully. Her own paranoia had fostered a strong sense of hearing in her, but her own personal anguish had clouded her judgement and dulled her senses. She was caught completely unawares at the sound of a voice, but she forced a calm reaction out of herself. Though her eyes slid open slowly, she immediately allowed her wand to fall from her sleeve into her waiting hand.
Ne'Os. She had many reasons to hate the man, but the one that would continue to boil her veins was the murder of her cousin, her poor, senseless cousin. Now, so alone, she felt his absence keenly. But, she should, logically, fear him too, as he probably knew that she had only ever joined the Death Eaters to rescue Nemo. With Nemo now safe, she could not have pleased the Death Eaters.
It took all the self control in Jack not to turn and simply send a killing curse Ne'Os' way. She had gone beyond caring for her own morality. She blinked at him, before saying, her voice heavy. "For the sake of my own damned soul, I'll give you one opportunity before I attempt to relieve the world of your presence."
((Yeah, so Jack defected from the Deathies after that meeting, where she got her Dark Mark. She took Nemo with her. I worked this out with an admin and Red, and Aaron knew I intended to do that. I suppose Ne'Os knows about this.))