Clair and Cliff Huxtable are doing what married couples do, when their teenaged daughter barges in. A problem? Of course not; it's a chance for Mom to provide a few lessons.
A boy leaves home and joins the Navy, because he is in love with his mother. He returns a man to find his mother and little sister are in love with him. They become the perfect family.
Muffy visits her cousins on the farm every summer, but this year something's different. Her cousins are hiding something. When she finds out what it is, she wants to join in. Then they all find out there's much more to their ancestry than anyone would have thought. What they learn brings new meaning to "It's a family affair".