Answer
Wallis Simpson, Duchess of Windsor had two ex-husbands when she married Edward VIII, Prince of Wales. Her first marriage was to Lieutenant Earl Winfield Spencer, Jr. from 1916 to 1927, and her second marriage was to Ernest Simpson from 1928 to 1937. Wallis's divorce from Simpson in 1937 caused a constitutional crisis in the United Kingdom and led to Edward's abdication in order to marry her.