#nanny

I am struggling with my children's sleep and letting them know the nanny is leaving. Helpo!

I would love some sleeping advice. My oldest child 5.5yo and my youngest 2.5yo share a room at night. They each have their own bed. They fall asleep fairly normally… book, tucked in, rub back, fall asleep, I sneak out.
Somewhere around 11:45pm-2am my youngest will call me in to put the blanket on her, or my oldest will come and get me to rub her back or snuggle. This will continue through the night.
We are also in search of a new nanny. How do we tell our children?