I have family where the male could not conceive, so they went with a donor. Beautiful little girl resulted, but I know that in 15 years or so she will be curious and want to meet step-”siblings”.
We are girding for potential drama. What if there are dozens, or a few or none? They will all be curious and some type of “re-union” in the 2030s will be the result.
I know two people who found very close relatives through Ancestry.
One of them signed up and a woman emailed him saying she was a 1st cousin. So he emailed his 5 uncles about it. They all got mad at him saying he sent an inappropriate email. LOL Not sure what happened after that.