I mean it's awful, hate the talking toy dog, but the best bit about John Lewis adverts is trying to find reasons to be outraged or making up scandalous back stories, for instance (off the top of my head, I could play for much longer if I rewatch):
Penguin - sex trafficking/forced marriage vibes
Moon man one - what did he do that was so awful they moved him to the moon?!
This one - what did grandma do previously? Did she ruin a Christmas in some way, is there a massive NC back story and this is the first chance to try again? Are they all there under duress - maybe she threatened to write them out of the will if she doesn't get to see the grandchildren, and mum and dad need the money because she previously tricked them into funding her huge house purchase and they weren't legally savvy enough to protect themselves so they now have to grin and bear and play happy families even though she ruined their lives... Hence mum not caring about the behaviour.
You know.... That sort of thing, it's a very christmassy game obviously 😁