Petticoat Junction 3x12

One of Kate Bradley's old swains named Ralph Denton sends a telegram stating that he is coming by the hotel for a few days. Uncle Joe thinks Kate is acting just a little too nonchalantly, which means she still has feelings for him. Ralph shows up with his overbearing and busybody spinster sister, Mabel. The girls and Uncle Joe do whatever they can to preoccupy Mabel so that Ralph and Kate can have some romantic alone time together. But Joe's spending so much time with Mabel leads to an unintended marriage announcement.