Stepmother and Her Sister

His stepmother already lives in the house. Then her sister starts staying, and the two women stop pretending that chores are the only reason to share a room. They are adults. The attention they turn on him is deliberate: a pose during the housework, a night that does not end in separate beds. He lives there. They know when the man of the house is away. / The danger is the pair deciding the secret is easier to keep together. If the sister leaves, the story can still be denied. If she stays, the house has taken a shape it cannot explain when someone who belongs there turns the lock.