The other sister / S.T. Underdahl.
Josey Muller's life is shaken when her parents inform her that she has a sister. Having given up the baby while in high school, they are overjoyed to reunite with Audrey, and even Josey's brothers are cool with it. But Josey, no longer the only daughter and the "smart one" in the family, struggles to accept her infuriatingly friendly, witty, and talented older sister, until a new side of Audrey offers a fresh start for them both.