Lucius looked at his son and took an involuntary step forward. "I was ordered to protect the Black family vault from Harry Potter. I was not ordered to protect it against my own son. He placed me here about three weeks ago, around when I felt the tether to your mother disintegrate." Lucius paused to take in his son, standing proudly before him. "Everything we did - we did it to protect you. To give you the chance at a future. I don’t begrudge you fighting for it. We fought too, just on the other side."