14- The Pharaoh invites Joseph's family to live in Egypt
"Pharaoh, can my family stay?"
15- Joseph's descendants move to Egypt.
As the brothers were brought back from the guards Joseph decided to reveal himself as their brother. As he did this they were all so shocked but happy at the same time. They thought they woould never see their brother Joseph again.
Joseph then goes to tell the Pharaoh about his family visitors and the Pharaoh also says his whole family can stay in Egypt with them. Joseph is so thrilled and everyone goes back to Egypt to fetch their father and other descendants to live in Egypt.
Joseph and his brothers went to fetch his father from their town and then started travelling to Egypt. Form there on all of Joseph's family grew up there and thats how their descendants migrated.