227 S01E19 - Fifty Big Ones

At their vows renewal ceremony, Mary's parents are in the middle of the argument and are not talking to each other. Lester talks to his father-in-law, and Mary talks to her mother to encourage them to make up and go through with the ceremony. Meanwhile, Sandra meets a man who turns out to be married, and Rose has a peculiar conversation with another man: it turns out that both her late husband and his late wife both used to vacation in Vermont for one week out of the year, to go "fishing" and "writing poetry," respectively. They both assume that their mates were cheating with each other, until they realize that their mates used to go to separate cities in Vermont.