I do not know the english word for "Einlieger". He lives in a separated apartment or special house in a farmyard and works for example as ploughboy.
Tochter means daughter.
Dienstmädchen means Maid or farmgirl.
So she was the daughter of an Einlieger and she herself was working as a maid. Maybe for the farmer.
Does the grandmother also lived in the "Einliegerwohnung"?