In elementary school We had a WWI memorial lesson, and we were asked if anyone had relatives who served during the war. My friend brought in a photograph of his great, great grandfather and his wife. A young lady also brought in a photograph of her great great grandfather and his wife. They appeared similar to the teacher. We gathered around as she placed them side by side, stunned, and it was the same man who had kept his two wives a secret. Both had married in private. They had no idea they were cousins.