"A marriage she took at great risk to herself, to be an insider to the enemy," Harry explained. "And to be able to keep a tab on me surreptitiously through Draco. She knew I was alive in that forest. She used quick Legilimency on me to see if Draco had survived. She saw that we saved and spared him. She's really very powerful, you know. Had she any lingering doubts about me, the act of saving her son convinced her to continue taking risks for me. She defied Riddle, lied directly to him, then facilitated my rescue. I don't need to tell you how brave a risk that was for her to take."