I agree with Playfelt on this. I think I would tell the caregiver that you want this to work and would like to help with the process, so if she could make some notes of the types of behaviours she sees in your son, that would help you both come up with a plan for how to deal with them. It is VERY hard as a parent to hear that our child is not a perfect angel, but as Playfelt said, if you see challenging behaviours at home, it is more than likely he is doing them there too. I have a 3 year old son myself and I know he can be challenging at times for me, so don't feel like you are a bad parent because your child misbehaves. If you truly feel that you cannot work with this provider then you should start looking around in the evenings, but you may end up having to address these issues with the next provider as well.