What Child Is This‪?‬

What had happened to her own daughter? Where had this child come from, the mother wondered. Who was she? Why did she sit for hours staring at her baby brother, contemplating...who knew what? It was enough to drive you mad...especially, if you had a history of madness. But the doctors had assured her that was all behind her, a thing of the past... Wasn't it? A short story.