What is the main conflict in Scribbler of Dreams by Mary E. Pearson?

Told in the first person narrative by main character Kaitlin Malone, the novel tells the story of her love for Bram Crutchfield in a Romeo and Juliet-like fashion. Kaitlin's family and Bram's family have hated each other for five generations, stretching back to a falling out between the Crutchfield sisters, Maggie and Amanda.