Hopefully she will carry on a normal with the children. At this point she might suggest contacting local hospitals, the police or any emergency contacts that she has for you if she can’t see a logical reason for the delay. A nanny should never suggest leaving your children with anyone else unless you’ve given specific instructions and contact details for family members who live nearby to cover this contingency. If she needs to leave to sort out her own family she should either suggest taking the children with her and leaving a note for you, or contacting social services.