I actually had something similar happen to me. I grew up as an only child most of my life (my little brother was born when I was 15) and lived with my mother and stepdad. When I was in my mid-teens, my biological father, who was still in contact with my grandparents even after my mom and he divorced, contacted me out of the blue and later sent me a letter packed with many photos of himself and a little girl. The little girl, I found out was my then 8-year old sister, whom he was raising as a single dad. I stayed in contact with my dad from that time on and years later, after I had married, I finally initiated a meeting with him and my sister in person. Growing up, I had always wanted a little sister, but unfortunately my parents never felt the same way. Now I found out I actually had one and was curious about what type of person she was. We were able to meet for a few hours at an airport in New York, since I was scheduled to fly to Ohio and had a 3-hour layover at La Guardia. My dad and sister lived only 30 minutes away from the airport and agreed to meet me there. The meeting went well and I was surprised how easy it was to talk to and interact with the family I had never met before and how we seemed to know each other all along. Aside from seeing me again (my dad had last seen me when I was 2 weeks old. At this meeting I was 21 years old), my dad and sister also got to meet my first son, who was 2 years old at the time. Since this time, I have been in close contact with my sister, and although we weren’t able to officially meet again, we are planning a summer visit to New Jersey in the upcoming year so that she can meet the rest of my family. The great thing about a newly discovered sibling is that while he or she may at first appear to be a stranger to you, since you did not grow up together, it is astounding to find out how many things you actually have in common, once you get to sit down and talk to each other. I am happy to have met my sister and I would make efforts again to meet any other potential sibling out there (although I don’t think there are anymore).