A hamlet is a very small village. A one-house hamlet contains just one house. There might not be a whole family living in it - there could be just one person living there. The only thing we know for certain from the piece is that there is a housewife in each hamlet. You might think that the term can only refer to a married lady but that's not necessarily the case. A woman who lives alone and has no job might also be referred to as a housewife.