Ancestry has a bigger data base than 23 and me but be prepared! I thought I knew EVERYTHING about my family...surprise, surprise! 2 stories:
3 years ago, I found out I have an older half brother through Ancestry DNA. Consolidated (but happy) story, he was born in Europe, given up for adoption by his birth mom at 3 days old and grew up 8 hours (in the USA) from us. He received previously unknown medical history information, 5 new siblings but best part was dad and son met for first time! We are enjoying getting to know him. (We think my mother likes him more than us lol)
My brother-in-law took a test since his wife was into family trees and found 21 half siblings?!? How can that be??? Came to find out he was the product of a sperm donor! (Both his parents alive, in their 90's but never told him). The count is now at 28 half siblings