2 What does the phrase in line 39, "We are not farmers of the sea. We never sow, we only reap." mean in the context of this story?

When they reached the door of the lonely house and stopped to unlock it, and the cat came to purr loudly, and rub against them, a deserted p***y, indeed, but fat with young robins, sylvia whispered that this was a beautiful place to live in, and she never should wish to go home. the description of the house in this excerpt gives an example of