The Rift Between Us by Rebecca L Marsh

After a family dinner turns into a bitter fight, sisters Maria, Lauren, and Avery decide to go their separate ways. Their father warns them that someday they will need one another. When he dies suddenly, they learn that he intends to make sure that they do. He’s left them a substantial inheritance, far more than any of them ever imagined. There’s just one catch. If they want the money, they will have to spend two weeks together at a secluded lake house and follow all of their father’s instructions — no matter how strange. Their task seems simple enough, but each one is holding onto…