Ah, Provence! The French Riviera – where the well-to-do rent luxury villas for exorbitant sums in order to get their annual fix of sun, sea, and haute cuisine. However, imagine the crisis if one such sumptuous place was double booked. Worse – triple booked! By a French couple, an English couple, and heaven forbid, an Irish couple. Marriages have foundered on less. Add copious champagne, friskiness, and ingrained cultural differences, and the European Union (never mind Brexit) comes close to imploding.