From Longman Dictionary of Contemporary Englishthe lady of the housethe lady of the houseold-fashionedWOMAN the most important woman in a house, usually the mother of a family → lady
Examples from the Corpus
the lady of the house• Here again the lady of the house was so kind and resourceful.• And the lady of the house hugs you and laughs, and takes you to the sea to wash your face.• Then the lady of the house calls them to come and eat, and the sad little performance ends.• I don't know what he said to the lady of the house, but we were not invited to return. 