Three Spare Wives (1962)

A man from England goes to the Middle East to settle the affairs of an uncle who lives there for several years and he learns his uncle has three wives. And per the country's tradition, his wives are now his. Problem is that he's already married. But he learns that there are consequences if he rejects them. So he brings them to England and doesn't know how to tell his wife so he tries to keep his wife from finding out about them. but when she does things become complicated.