I don't think its your job to apologize for your daughter's behavior. Its his daughter too. Its between them. Once you explained it was your daughter not you, that should have been the end. He needs to deal with that head on with his daughter. You do not need to be getting in the middle of it. She is 10 years old. She understands what is going on, and its time he mans up and does something about it.
M: 31 H: 29 Married: 6 yrs Children : 7yr old, 5yr old, 2yr old
Separated: Sept. '09 Moved Back In for wrong reasons: Nov. 30, 09 Recomitted to our Marriage: Jan. 25, 10 Threatening to leave again: July,14