Lucius is uncertain what to say to that. "I try. I do." He misses Draco, and he has a great deal more contact with muggles than he'd care for, but Narcissa is with him. Unless Bellatrix takes a wild(er) turn, he's relatively safe here, at least from the threats he can see coming.

"There's a world in which I - we - a Lucius dies before the second war ends. If I have my memory of this place when I go back, Narcissa and I will do everything in our power to keep our family safe." Draco, then one another.