Perfect Strangers (2001)

When Daniel attends an extraordinary family reunion with his parents, he discovers a world he hardly knew existed. Seduced by the allure of this new world, Daniel adopts the role of go-between for his glamorous Aunt Alice and his dazzling cousins Rebecca (Claire Skinner) and Charles (Toby Stephens). But even the most honorable of intentions have the potential to go disastrously wrong.