Gro go and talk to your mum. There are staff there who can help him snack.
Mr Gro will be disorientated to time and place, but, he'll understand if you're not there when he wakes.
The staff will remind him that it's late, and you needed to rest. He's a nice man, he'll understand. Besides, as far as honeymoon's go, this sucks. He totally owes you.
Go and talk to your mum. She'll be glad to be helpful.
Get a change of scene, a bath, clean knickers, a hug from folk who care and go back to Mr Gro in the morning. If there's a sudden change you can be there in, what, how many minutes?
Go on. You'll crack if you don't get a break. and, having been the psycho-bitch-mum on a ward in the past, you really don't want to crack. It's not a good look