Unrelated (2007)

During a sticky patch in her marriage, fortysomething Anna spends a summer holiday with her friends Verena and George at their Tuscan villa but hangs out with the couple's teenage children and their cousin Oakley, with whom she goes skinny-dipping and sight-seeing. When the youngsters prang a borrowed car and Anna tells George how it happened, causing a huge scene with his elder son, the kids turn against her. Observing family life as an outsider--unrelated--Anna ultimately comes to be grateful for what she has.