The context of the following conversation is Because Alex agreed to babysit his niece, he put her to bed at her normal bedtime.:
Alex says I'm going to be a good uncle, and make sure she gets some good sleep tonight.
The friend responds I'm sure your sister will really appreciate the baby being asleep when she gets home.
Alex responds She was been working overtime and she needed a day off to enjoy her time off.
The friend responds the baby looks so happy when he's sleeping and he makes that face.
Alex responds he is such a little cute baby.