When Francine and Hayley meet up with Francine's wild friend Kelly for a drink, they drink so much that Hayley's kidneys fail. Stan is ready to offer her one of his but Francine reveals that he might not be a match as she was unfaithful and he might not be Hayley's father. Stan and Francine have to travel back in time to get a DNA sample from her one-night stand and find out who the father is. Show less