Thanks all. I had a long chat with dcm and recieved an apology from dcd this morning. Apparently they were more upset about last weeks bite than they seemed. I made it clear I am working with dcb who is new and very young on not biting. It's just very surprising coming from this family. Less than 2 years ago I watched their son who was the biter! You'd think they would be more empathetic. Either way, I made it clear they need to trust me and I don't tolerate accusations like that. I hate putting my foot down but I'm glad you took it ok.