Recently my daughter had a stroke and had to leave her then 9 month old daughter at home while she was in hospital. Her partner looked after the baby at night. She was used to being breast fed back to sleep several times a night, but on looking round and seeing Mum wasn't there, she accepted a cuddle as comfort and went back to sleep happily without the breast feed. At this age, it is just comfort not food that is needed in the night so the important thing is probably to find out what comforts your grandson other than the breast. Good luck with your overnight. I hope you enjoy it.
90th birthday mini hamper ideas!