Thank you, everyone
I'll rearrange the furniture, and I did try turn autonomy off, which helped a bit. My broke sims bit the bullet and hired a useless nanny and had to fire her after she left the toddler stuck in the highchair :O and ignored the other one. The second nanny was amazing and cooked for the family! They had twins, so much for just two kids for their family lol as they already had one
I was tempted to run away and leave them to it and play another household until they got to child stage, but they only have one day to go, and I managed to get the parents to use their leave time and take shifts sleeping. Man what a mission!