What is the ruling on the husband's father living permanently with the wife in the same house, and what should she do about that?

The wife has the right to an independent dwelling with its facilities. If the husband allocates an independent part of the house with its facilities for her, and houses his father in the rest of the house, then she does not have the right to demand another dwelling. However, if the husband's father lives with the wife in the same house with shared facilities, then she has the right to demand an independent dwelling. The advice to the wife is to be patient with the presence of the husband's father and to help her husband in honoring his father and treating him kindly, as this is among righteous deeds.