My son discovered he has a half brother.
Posted on 04/07/15
Thanks to the help of the mother of my son's half brother (found on the DSR), I was guided to try 23andMe. We received the results today and indeed her son is my son's half brother. We are going to let them decide what to do since both are adults. It does seem that both are interested in connecting with each other.
Thank you to Donor Sibling Registry.