This is not a good time to discuss what happened. [This is the most composed she has sounded during this conversation so far, much more her usual regal self, and her tone, although it's quiet, likely makes her meaning clear: "I'm very displeased that you followed after me". She looks down for a moment, fidgets with her hands... even as she's putting more of her usual facade together by the minute, she's still racking her brain for how to handle this.]
But since we're here... [because of him] I-I admit I'm not certain what all this was. As I understand it, it was all this world's magic, and no one knew what they were doing. Did anyone besides you and me know?
[Of their relationship. Please don't make her specify that's what she means. As far as her memories go no one else knew and she trusted Bucky not to tell anyone, but... well. Obviously memories are not exactly trustworthy in this situation.]