Right or wrong, one thing the Ancestry test may do is help resolve the "Who am I?" questions.
My mother was married several times, and had children from at least three different men. My younger brother and I were the last in the line. We four siblings grew up knowing the older two were half-siblings, and my younger brother and I were the only two with the same father. No biggie, it was just how our lives played out. As adults, we have a great relationship, and parentage is a non-issue for us.
As we grew up, my younger brother and I came to look very different from each other. While I am the obvious child of my father, (our looks are very similar), we have always wondered about my younger brother. The resemblance between us was our mother's features. My brother has none of my dad's looks. Something was afoot, surely.
All our parents have been deceased for years. Going through family lore, a few nefarious notes we found in mom's things, and finally, due to a very direct, almost vicious letter written to my brother by my mom's female so-called "best friend" at the end of her life, accusing our mom of all sorts of misdeeds while she was married to someone else, we decided we needed to know what was going on. My brother had always felt like an outsider, and he wanted to know the truth. Dad left when my brother was only two, so my brother didn't really know him.
I had previously done the Ancestry test. My daughter had done the test, and had learned a lot about how to compare results to find genetic differences between family members. So my younger brother took the test. And sure enough, we do not have the same father. That in itself was not a great surprise, but it was nice to finally have it confirmed. It could have ended there, and we'd have been fine with it.
But then the question rose of who my brother's father is. My daughter dug deeply into the Ancestry databases and family trees, and within a very short time had found the answers. She found not only the right guy, but also that he has a family. When my daughter visited the Facebook page of one of those other sons, she found a man who could be my brothers twin. They are only a year or two different in age, but their looks, body type, interests, and so much more are so similar, it was uncanny. My brother was dumbstruck - it was like looking in a mirror. But he could also finally relax, knowing who his father really is. That man is still alive, but is quite elderly now. My brother has no interest in contacting him, or trying to establish a relationship with him, because it's not important. He knows who he is now, and that was the whole point.
None of this is being said to pass judgment against anybody in my family. My mother had her reasons for how she lived her life, and things between her and my dad were not always good. Their divorce, I think, was inevitable The good from this is my brother now knows his own story, and that's the validation he wanted. After nearly sixty years of wondering why he was the odd man out in the family, he has his answers.
Dave