Apart from that Draco and Ron had always been like brothers, it only got deeper when Hermione - Ron's best friend started dating Draco and married him. Ron and she work in the same building, at the ministry with him as the Auror Head and she as the Head of care for magical creatures. Narcissa visits Molly and Arthur almost daily -as they live alone now with all their children moved out with their own families - as she becomes best friends with the couple in the years of Lucius's absence, she says she always learns something from Molly's cooking skills or Arthur's muggle collection shed.