My adult children live far away. So I never know if they are back to their homes safely. I never worry.
However, when they visit me I can't sleep until I know they are back and in their beds!
But I do think that as she is leaving a daughter in your care, it would be sensible and respectful to ask if you would take over her care for the night and following morning. A text is a simple thing to do.
paying a teenager for watering
Fabric conditioners - are they a con?
Price of books - Amazon the pirates!