The One That Was Forgotten (Divergent FanFic - The Eaton's)

What if Tobias was not the only Eaton child? What if he has a twin who left Abnegation with him for Dauntless? But, then he had a younger sister also, how would she cope?
This is the story of the youngest Eaton, Jamie. When her twin siblings left, she would be left alone with her father.
The story begins on the day on Jamie's choosing ceremony with flashbacks to the past. How did she cope? What choice will she make? Make her father happy? Follow her siblings?
Jamie has a big choice to make and whatever she chooses will shape the rest of her life.