The Patchwork Weasley

AU/Canon based. DARK. After Charlie was born, Molly had trouble getting pregnant again. After failing to conceive for three years, Arthur and Molly decide to adopt Percy, but hide it from the rest of the Weasley's to make his life easier. Things were going well…right up until his sixth year, where Percy's mother comes back into their lives and takes him back… home? TW: child abuse