"Pearl rolled a tiny pink speck in her fingers, possibly part of Rose's new leg that I'd tried so hard to make a good match. Pearl laughed and flicked it away as if it was snot out of her nose. I suddenly couldn't stand it. I rushed at her.She saw I wasn't playing around. She ran for it but I caught up with her along the landing. I punched her hard in the chest and she staggered back wards - back and back, and then she wobbled and went right over, down the stairs."