Grier's Sister (a Frankie, Dolans and Griers fanfic)

My name is Gianna Grier but mostly everyone calls me G for short. My brothers are Will, Nash, and Hayes. I have a little sister, Skylynn. I don't see my brothers very often because they're usually on tour. But what happens when her brothers take her to LA and she falls in love with Frankie G, Becky G's brother. She en...