Klaus Vedfelt/Getty ImagesMy mother would have you know our lineage the minute you meet her. I am the eldest daughter of the eldest daughter of the eldest daughter, going eight times back. She is proud of it, this freakish line of vaginas slotting neatly into one another back into time and space, like Russian dolls. I always doubted her assertion that this was true, until an Ancestry.com test allowed me to access the family tree portion of the app, and I counted one, two, three, four… all the way back to eight. What could this all mean? A curse? A superpower?The eldest daughter trope is known...