Very disrespectful and tude 7 year old. Advice/opinions?

[Sunflower]

I can't believe how sad this is.
The parents are more worried about what others think to care for their child and that is pitiful.

However this is not your issue and it sounds like you have gone above and beyond for this child.
If it were me I would ABSOLUTELY terminate for behavior like this from a 7 year old and lack of accountability like this from the parents.
Perhaps you terminating them will force them to re-evaluate the situation and it's seriousness.

What ever happens you must keep the other kids in mind. This behavior will rub off on them and then you will be left having to explain yourself to other parents.
Another thing to keep in mind is that this child must be exhausting to care for as well as very time consuming.
Picture your daycare days without her and do what you have to do.
Please keep us posted !