Other than counseling, the only other thing you can do is to not allow it at your house. Explain why to make sure she understands what she is doing is wrong, then discipline when she continues the behavior.
My son picks up bad habits when he spends time with his dad too...sometimes they are little things like burping and smacking with his mouth open while eating, but other ones are more serious like smacking his head against the wall, stomping, saying things like "shut your piehole", and slamming & kicking doors...among other things. The only thing I can do is remind him of the rules at our house and not accept the behavior.