The Little Hut.

Sir Philip Ashlow, his neglected wife, Lady Susan Ashlow (Gardner) and his best friend Henry Brittingham-Brett (Niven) are shipwrecked on a desert island. Susan feels neglected and has been trying to make Philip jealous by demonstrating a romantic interest in Henry. The quarrel escalates until Philip declares that, as captain of their ship, he feels entitled not only to perform marriages but to grant divorces.