Stephen´s hypotheses change a lot along the novel. At the beginning, Stephen believed Keith´s mother was a spy helping the Germans. Later, this first hypothesis evolves into the belief that Mrs Hayward was having an affair with a shotdown German pilot whom she is also helping to survive.
Everything starts when Keith tells Stephen the six words: “My mother is a German spy”. Stephen is surprised and excited about the idea of going out and investigating. The first hypothesis that comes up to his mind is “She has her eye on all of us”, and together with his friend Keith, he starts observing her closely and following her around. They believe she is passing information about the neighbours in the Close to the Germans. They even consider the idea that she might have been responsible for the destruction of Miss Durrant´s house.
Everything starts when Keith tells Stephen the six words: “My mother is a German spy”. Stephen is surprised and excited about the idea of going out and investigating. The first hypothesis that comes up to his mind is “She has her eye on all of us”, and together with his friend Keith, he starts observing her closely and following her around. They believe she is passing information about the neighbours in the Close to the Germans. They even consider the idea that she might have been responsible for the destruction of Miss Durrant´s house.