"It is not an exact art." Not by a long stretch, she can guess as much without having to ask any details of his visions, though she is sure to go there sooner rather than later. Curiosity could kill many a cat. He has answered a question she has not directly asked – does the Minister know? This is a walk on thin, thin ice with her, her being among those who conceal no thoughts from him at all.

However, he is a skilled Legilimens with little to no competitors. He could have very well found out on his own, and that without Lucius himself knowing, powerful Occlumens or no. In this thought, she finds absolution. She is rarely one to prefer indecision, but she can opt not to decide at all, have faith in their leader, and...

... and what?

Is this her protecting Lucius, somehow? Her hands drop to her sides when he shakes his head. "And it is not for me to speak of."

It isn't an oath, but it is a promise.