Dad. That was...different. Luke, the older Luke, had always called him Father, and the way the boy had said it always sounded more respectful than loving. But hearing this younger version call him Dad? It made a small smile come to his face completely of its own accord as he watched the boy move into the bathroom.
Perhaps fatherhood wouldn't be so bad, after all.
He moved to his wife then, wrapping his arms around her as he leaned down and pressed a tender kiss to her lips.