Contacted my sibling's parents

My name is Courtney and I am a triplet. Last year we found out that our biological father was a donor. This year my mother let me sign up for the sibling registry. When I added a posting, one of my siblings mother had emailed me. We shared photos and she had told me that she is in contact with the other parents of my siblings. We have eight other siblings. Signing up for the donor sibling registry was the best thing ever.