Who played Janet's mom on the Walton's John boy's mother-in-law was played by whom?

Janet's mom on "The Waltons" was played by actress Ellen Corby, who portrayed Grandma Esther Walton. John Boy’s mother-in-law, in the series, was played by actress Mary Jackson, who took on the role of Sara Simpson. Both characters contributed to the show's portrayal of family dynamics in the Walton household.