Never knew my dad growing up. My mom's best friend lived a couple houses down from us. I was best friends with her son and daughter. Her daughter is my age. In high school, we started dating and ended up having sex. She broke up with me when her mom told her we had the same father. We were both pretty upset by it. We thought we were in love. It was a long time before we started even talking again. But at college (we both go to the same state university) we got to the point we were hanging out all the time like 'before' and eventually our attraction to each other got the best of us. We had sex again. I loved it, but she was freaked out and scared. We talked it through, and we decided to give it a try as a couple, but in secret from anyone who knew about us being siblings (half). We've been together for over two years now. Our parents know about it now, and hate it. So, that was the short version I guess. There was a lot of drama about our relationship when we were in high school (rightfully so).
[...] [My biological dad] was married to her mother. They have since divorced. He's always been a real quiet guy. I don't know him all that well, and have never considered him to be my father in anything but blood. He cheated on her mom with my mom. They were all friends. My mom married a good man who adopted me after they were married. My step dad is the only 'father' I recognize. His name is on my birth certificate (that's how that kind of adoption works even though he didn't come along until after I was born).
[...] We're still young (just finishing our undergraduate degrees), but we have discussed starting a family. We want to get married (different last names, not legally related). We want to adopt or foster, or both.