I had a similar situation with neighbors across the street. In complete denial. Every dongle day I would give the list and they would act in shock and say he's never like this at home. Um.... I live across the street and I see the way he treats you and his brother. Wake up. I have them their termination letter saying I've worked with you for said time and his behavior towards me and the other children is getting worse. He is not a good fit for this daycare. We haven't spoken since haha. Thank goodness. I didn't want our children playing together with an in disciplined bad egg. Your children's safety is more important then a ruined relationship with your neighbor. Do not keep this child another day. Luckily this boy was not hurting the other children like your dcb is. But he was on his way, so i terminated before it got there. When the parents aren't on board with discipline the child will only get worse. If I were you I'd terminate today. If he's there call them to come get him and say he's not welcome back. I wouldn't allow your children to play with him after this unless his behavior is dealt with. Bad behavior is contagious. Let us know what happens.