I have never looked into my sister's eyes. I have never bathed alone. I have never stood in the grass at night and raised my arms to a beguiling moon. I've never used an aeroplane bathroom. Or worn a hat. Or been kissed like that.... So many things I've never done, but oh, how I've been loved. And, if such things were to be, I'd live a thousand times as me, to be loved so exponentially' In twenty-nine years, Rose Darlen has never spent a moment apart from her twin sister, Ruby.