Troubles in Paradise by Elin Hilderbrand

After uprooting her life, Irene Steele has just settled in at the villa on St. John where her husband Russ had been living a double life. But a visit from the FBI shakes her foundations, and Irene once again learns just how little she knew about the man she loved. Irene and her sons try to get on with setting up their new lives while evidence mounts that the helicopter crash that killed Russ may not have been an accident. Meanwhile, the island watches this drama unfold – including the driver of a Jeep with tinted windows who seems to be shadowing the Steele family. As a storm gathers strength in the Atlantic, surprises are in store for the Steeles: help from a mysterious source, and a new beginning in the paradise that has become their home.