He kissed her in return, "He was a little fussy, so I fed him. I didn't want to wake you up." Because he knew she would need her rest, and he had no qualms in getting up in the middle of the night to feed and take care of Edward. Tony was more of a night owl anyway, so it fit with him perfectly.
"We'll just sit here a few more minutes and then I'll put him back down," but the truth was, Tony didn't want to put him back down. He never wanted him out of his arms or sight. He always had to be touching him somehow, to know the baby was alive and well. "Pull the other chair over here and sit with us."