Books (novels and essays) Japanese literature Neighbors she doesn't know

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Japanese Literature
I can't find the answer, but I won't run away. I'll tell you not to run away. 咏子, a housewife, was living an ordinary life with her husband, a daughter of an elementary school student and her son of a high school student. One evening, she witnessed an explosion at a commercial facility near a train station. She was worried about her son who was using the train station, so she called him. However, she that he was excited and said, "This is terrorism."