She had stirred Matt's anger. Jack could feel it, which perturbed her. Typically, she could sense the emotions of people around her, but they were usually either incredibly strong, or she was connected to them somehow. Jack doubted Matt's anger was large enough to be picked up, but she did not like the idea of being connected to him right now. He was angry, sure, but Jack was scared, and livid. A terrible combination for her, as it usually led to the worse reactions.
"You play games and drink, but don't think it makes it all up. You need about a thousand drinks to make up for stopping him, for trying. You might have been up there the whole time, but he still went down. You were there- you are leading the Order of the Phoenix! You want us to believe you can help protect us from the Death Eaters, but protecting Poe from himself. I almost lost hi-" she stopped herself, by turning and dropping the class into the sink. She stared down into the sink. That last sentence had too much fear, too much feeling.
Matt was still speaking and Jack straightened up, forcing control back into her. Body fully drawn, eyes locked into danger rather than emotion, jaw still, hands barely twitching. She turned around and said, "Letting yourself die with him does not keep him alive, Matt. You keep him alive, or you let him die. There's two choices. You came too close to the wrong one."