People who thought they were identical simply because they shared a face and a height and a hairstyle weren`t paying close enough attention. Heather had been swimming competitively since the age of twelve, and had the muscled arms and lithe build that came from her athletic choices. Holly, in contrast, was slim instead of sinewy, and often needed to ask her sister to open jars or lift boxes for her. They knew their differences inside and out, had been charting them since the day they began to deviate from their simple synchronicity. Let them be taken as identical in the eyes of the world. They could never fool each other, and that was all that mattered.