In Which Ma's Sister Bertha Comes to Visit

S1 E5: With the imminent arrival of her sister, Ma is cleaning like a demon. Bertha and her family are firm suburbanites who despise the countryside and in particular dirt and animals. Things aren’t going very well between Mariette and Charley, so Tom makes his move. Meanwhile, Tom’s plans for Bluff Court are speeding ahead, and Ma and Bertha do some speeding of their own in a not-so-sisterly road race.