like the young hillbilly boy brings home his future wife to be have dinner meet his family and dad pull son aside and says son you cant marry her shes your half sister, the young boy is devastated, a few months later same thing brings home his new bride to be to meet the family and again dad says boy ya cant marry her shes your half sister too, devastated this time the young boy goes to his mom whining how dad is ruining his life the mom smiles and says son its ok hes not your dad:::::::::::har har har