Me either. I thought that Meg's emails to the child protective services lady were aimed at finding out about what would happen if she revealed what was going on. Grace made some comment about Mr. Manning saying she wasn't "ready to come out" or something like that. It sounded to me like the abuse perhaps stopped or changed with Meg and Lizzie, but they had gone through what Grace was enduring now. I assumed that Meg reached a point where she wanted to protect her sister, but was still afraid of her parents and the consequences of revealing the family secret.