The Girls of Pleasure Island (1953) Leo Genn

In the spring of 1945, World War II is coming to a close. Roger Halyard, a dignified, straitlaced Englishmen, lives on a South Sea atoll with his three daughters, Gloria, Hester and Violet, along with the housekeeper, Thelma, who has raised the girls since childhood. Other than their father, the girls have never seen another man. Halyard is informed that 1500 U. S. Marines will soon arrive to establish an air base on the island.