Jennifer was forty-one, divorced, and the mother of both Holly, who was twenty-two, and Bethany, who was twenty-four. Bethany had been at university but couldn’t cope with the pressure and failed the exams at the end of the first year. Since then, she had lived back at home with her mum, noticeably hardly went out, had no friends, and spent a lot of time on her tablet or reading books. Holly was living just three doors aw...