He's still in hospital but coming out today or tomorrow apparently. He's done damage to his kidneys, due to not looking after his diabeties and other medical issues. (Some of his medications caused damage apparently but he never questioned it or really worried about it.)
My mom, meanwhile, is going into super martyr drama mode and it's doing my head in.
Thanks for your vibes ladies. I'm hoping this was enough of a scare for him to stop being so passive in terms of his health!