Summer at the Cape / RaeAnne Thayne.

"As the older sibling to identical twins Violet and Lily, Cami Porter was always the odd sister out. The divide grew even wider when their parents split up--while the twins stayed in Cape Sanctuary with their free-spirited mother, Rosemary, fourteen-year-old Cami moved to LA with her attorney father. Nearly twenty years later, when Cami gets the terrible news that Lily has drowned saving a child's life, her mother begs her to return home to help untangle the complicated estate issues her sister left behind. Navigating their own strained relationship, Cami readjusts to the family and community she hasn't known for decades, including the neighbor who stands in the way of her late sister's dream, while Violet grieves the loss of her twin and struggles to figure out who she is now, without her other half, as the little girl Lily saved pulls her back into the orbit of the man she once loved." --Publisher.