Adrift (2009) [DVD]

While spending summer vacation with her family on the idyllic southeast coast of Brazil, fourteen-year-old Filipa (newcomer Laura Neiva) discovers that her father (Vincent Cassel of Black Swan), a famous author, is betraying her mother by dallying with a beautiful young American woman (Camilla Belle of From Prada to Nada). Wrestling with the truth, Filipa will soon discover that her father's infidelity is only the first of many dark secrets that lurk beneath the surface of her seemingly perfect family.