How do I deal with a difficult attorney?

My client filed for divorce and this attorney is representing the opposing party and he is being a complete *** about it. My client who lives in another state is not requesting child support, is going to grant her ex visitation by his terms with their children and does not want spousal support (she said all she want is out of the marriage). This attorney is demanding to know the whereabouts of my client, why she will not be attending a hearing regarding visitation (even though she has agreed to the visitation) and wanting to contest whether my client actually signed the doents for the divorce. My client contends that she doesn't want to talk to her ex at all which is why I think that the parties are pursuing this because he acts as if he doesn't want the divorce. This attorney is causing more trouble than anything. How best do I deal with him?