 Family lived up in Nazareth, and they were spread apart by about 60 miles. They must have come together at Passover and other events. And whenever they did, the stories must have been the stories of the great angelic appearances, the virgin birth, all of that. That was all part of the family history. They were well aware of the fact that Jesus came down through the Davidic messianic line, His descent through His earthly father Joseph, His descent through His mother Mary, both coming from David.