My mother's husband died when I was 4, and I thought he was...

My mother's husband died when I was 4, and I thought he was my dad until I was 15 and found out that my legal guardian was my real dad. He kind of acted like my dad, anyway. But he wasn't with my mother living at home with us. It's an unusual kind of story, but it was cool because I had two dads for a while, and it was useful in creating the character in the movie.