Friendly with the Milkman
This man’s father-in-law was always treated like an outcast by the rest of his family. As much as he tried to be like his sister and make his parents proud, he had always been the black sheep. He never understood why and speculated if a DNA test could give him any answers.
The storyteller’s father-in-law had briefly remembered the milkman growing up. But he had no idea that the man who delivered their daily dairy supply was his father! Everyone in the family knew about his mother’s affair, which he was the product of. The answer was that his mother’s husband was not his biological father.