In Genesis 43 & 44 Joseph's brothers return for more food and must face Joseph again. It's in these chapters that we see the story of Joseph turn from being about Joseph and being about Judah becoming the true leader of the family. Jacob was the father figure to all the sons. Joseph had the power of Egypt at his command and all the resources that comes with that. But it is Judah that becomes the central figure of the story. In doing that we see how God used the events of Joseph's life to save the 'family of promise' as He continues to fulfill the promise of descendants to Abraham.