[ It registered what she had said only after he had spent several more moments brushing the snow out of his eyes. Dad?

Dad?

No one in the history of... well, ever, that he could recall had ever called him 'Dad' before. ]

No, not Dad. Not even close to dad. We barely even look alike.

[ Which he spluttered knowing full well that they actually looked almost exactly alike. Comic joke, God's sense of humor, he didn't get it either. ]

The Doctor is your dad? He never once mentioned having a kid.