I don't think there is a Zanny either unless it's Casey. The grandmother would have at least known her. How did the grandparent's think that Casey was earning money? Did they know that her job at Universal was over and if not why did she keep it from them? Where did she get money to things?
If my daughter told me she was a bit short on the money to pay my grandchild's daycare, I would give her whatever she said she was short...as a grandparent, you want the babysitter/daycare as kind as possible to your grandchild, you don't want a caregiver wondering if they are going to get paid for watching this child. So if Casey often got money from her mother to help pay for the Nanny, Cindy was giving Casey spending money and that would be a creative way to get money out of your mom... sad way to do it but this is Casey we are talking about.