He waved off her question, but she didn't forget it. Likely it was something else that they couldn't talk about in front of her just in case she was somehow programmed to repeat everything she knew to Rodolphus. Or he might be able to read it in her mind if he was able to violate her again. While it was frustrating, she finally could understand everyone's reluctance to tell her anything. Later, when everything was calmed down a bit, she would ask him to clarify what he meant about a peaceful future. She could always ask Fenrir if she really wanted to know. He had a hard time denying her anything.