Emma owes him for this. The whole damn Charming family owes him for this. He is not a baby person, let alone a babysitter.
It's not nice to scare a woman, let alone a pregnant one. It wouldn't be proper to just sit by and let it happen.
It isn't right, what they do, but it can't end. They can't make it stop.
Albus is way too much like his Godmother and won't leave Rose's Game, Dominique is way too nice and resolves to do what she has to to get him out of the rain.
Hermione has never missed one of Harry's games and she isn't going to start now because she is NOT in labour! Not HHR , just friendship
Umbridge is getting rid of Santa; the Prefects and their friends disaprove and they'll do whatever it takes to bring him back, even if it does involve embarrassment, detention and bloody noses.
Most Eleven and Twelve year olds still believe in Santa, who are the older years to discourage that?