Personally it all seems like a HUGE line of B.S to me. Don't let them feed it to you. If they actually took you seriously they would have been proactive already. Daycare girl could be sweet as pie due to the fact that she knows she is leaving.

It seems to me like they let her be in control and why would she be giving in soooo easily. It sounds to fishy to me, I wonder what she gets if she behaves perfect for them. These types of parents always give a HUGE pay off.

You need to decide what you want to do but I wouldn't go back on that kind of a decision. Plus why is this child so disrespectful to her own father? If you can't respect your own parents then what is that saying about her character. I suppose it just may be Mom that’s the big softy? Even still why risk all that drama again?

If you do decide to give another chance I would tell them that there would be no more 2 weeks notice given. Let there be only immediate termination if her behavior returns.