My aunt manifests only the most occasional vestige of her old interest in who my actual father is or was; last Christmas, in Sawyer Depot, she managed to get me alone for a second and she said, "Do you still not know? You can tell me. I'll bet you know! How could you not have found out something? You can tell me. I'll bet you know. How could you not have found out something—in all this time?"
I put my finger to my lips, as if I were going to tell her something that I didn't want Uncle Alfred or Dan or Noah or Simon to hear. Aunt Martha grew very attentive—her eyes sparkling, her smile widening with mischief and conspiracy.
"Dan Needham is the best father a boy could have," I whispered to her. (8.11-13)
We find out later that, by the time this scene takes place, John already knows who his real dad is. Owen was right: it doesn't matter who John's birth dad is, because Dan Needham gets the award for World's Best Dad. Family isn't necessarily determined by the people you're related to by blood; it's all about who loves you and takes care of you.