Edith Windsor and Thea Spyer had a 40-year engagement and a two-year marriage, starting with a wedding in Canada recognized under the laws of New York, where they lived, and ending when Spyer died two years ago.
Her death triggered a $363,053 federal tax bill from which her widow would have been exempt had she been married to a man, because the federal Defense of Marriage Act bars the U.S. government from recognizing same-sex unions.
