housemother

noun housemother

• dowager — a woman who holds some title or property from her deceased husband, especially the widow of a king, duke, etc. (often used as an additional title to differentiate her from the wife of the present king, duke, etc.): a queen dowager; an empress dowager.
• housekeeper — a person, often hired, who does or directs the domestic work and planning necessary for a home, as cleaning or buying food.
• matriarch — the female head of a family or tribal line.
• biddy — If someone describes an old woman as an old biddy, they are saying in an unkind way that they think she is silly or unpleasant.
• administrator — An administrator is a person whose job involves helping to organize and supervise the way that an organization or institution functions.