Question about the night nanny [SPOILERS]

1. So if the nanny wasn’t real, who did the brother hire for her then?

2. And who was taking care of the baby at night? All of a sudden she was well rested and feeling good because the nanny was taking care of the baby. But - there wasn’t a nanny. So who was taking care of the baby outside of the feedings? You can’t pretend to have a nanny and then sleep all night. The baby is still going to cry and prevent you from sleeping.