Scootaloo had been without a family for a very long time. She has never told anypony about her situation. It isn't until a certain purple unicorn learns about her origins that she discovers what a family truly is.
It's not easy growing up in this sector of space. It's a place ran by fanatics, warlords and corporate empires of all sorts. The CMC are about to enter adulthood in one of the most violent eras of pony history.