 If you remember, John also records something that is not recorded in the other Matthew, Mark, and Luke. That when Jesus was on the cross, he looks down at John and he points to his mother and he says, behold your mother. And he points to Mary and he says, behold your son. Remember, Jesus was the firstborn son. And from that day, if it says from that day, Mary went home to live with John. Because she wouldn't have gone home to live with John if Joseph had still been alive.