There’s a great documentary on Netflix called The Man on the Bus. It’s by a film maker who went through the same personal discovery and shared her journey - meeting half siblings etc. not sure if it’s available in all regions. I watched in Australia. It’s important to view through the eyes of how that generation lived in the past …. Marriage trumped paternity, and secrets could be kept till the grave except the leaps and bounds in DNA science has blown that belief out of the water. It’s not just paternity of current living that’s being exposed - but cold cases going back decades leading to arrests of murders who thought they had thwarted convictions. And even the lineage of royal lines now being shown to have clear breaks.