Well she is punishing you for" inconviencing" her. It is unfortunate she does not have enough class or maturity to return your attempts at communication. She seems to have no problem disrespecting you by walking away without saying good bye or acknowledging your parental responsiblity to your sick child. If you want to keep her, I would do as you mentioned and give her an emergency contact form for her to fill out and a letter outlining the policies that hadn't been discussed. If she doesn't return the form, fill it out yourself when you ask her for the info the next time you see her and have her initial both the form and the policy letter. I would include your policy for late pick ups as well. If she still has attitude towards you after this I would terminate her. You do not have to put up with her bad attitude in your home. As the other ladies in this forum like to say "Your business, your rules" Good luck