I am concerned about a similar issue. This involves the non custodials GF, too. She bad mouths both myself and the non custodial to my daughter. She has also threatened me repeatedly with the FOC and other things. The Non custodial and I seem to be fine, but he places her in charge and expects that I hand over my daughter to the GF frequently. Can I insist that he be the one to handle the exchanges and that he be present for the time my daughter spends with the GF?