On the last Friday of term, just after the bell rang, Eva came up behind me at the bag racks. I was tying my jumper around my waist. ‘Do you want to sleep over at my house tomorrow night?’It had been ages since Eva and I had spent time together, just the two of us. ‘Yeah,’ she said. ‘Get your mum to call my mum tonight.’ She reached into her pocket and handed me a piece of paper that she’d ripped out of her science book. ‘This is her new number,’ she said.