 Ethel feels stung when the Mertzes are not invited to The Ramsey s dinner party. Sensing Ethel s hurt feelings, Lucy invites Betty and Ethel to a ladies luncheon. It gets off to a rocky start, but Betty and Ethel find some common ground -- Betty hails from Ethel s hometown of Alberquerque. The women became  thick as thieves,  as Lucy says and now she feels the odd friend out. When an intercom system, connecting the Ricardo s house to the Mertzes  guest house, is installed, Lucy misunderstands that Ethel and Betty are planning a housewarming, , but she s bitterly disappointed when she realizes the mistake. Ethel, who was so fragile at the start of the episode, comes through for her beloved pal in the end.