I can’t lie to her, she will know, she is the most powerful Legillimens here and she can shatter mental walls as if they are made from paper. She isn’t marked, but she can still tell him. He lives under her roof, but I need someone who I can trust. Father trusted her to tell her who I am and asked to help me when I was locked away in a prison. That is a sign that she did something the Dark Lord would not approve of and I lied for her, kept her secret safe. I am only in this situation because of her son and I am able to keep him safe when things turn to the worse.