I think they lived their whole 55 years together feeling rejected by their respective religions. They met at a free concert in Central Park during World War II. He was a handsome young Catholic Italian-American in uniform, she a shy Jewish girl out with her friends for the evening. They were immediately attracted. She always would light up when telling that part of the story.
But the rest was not easy. They married in spite of strong parental objections, and she always felt the outsider. Today this would hardly qualify as a cross-cultural relationship. But a half century ago it was nearly akin to an interracial marriage.