We have discussed your Ex's mental health disability in PM's, I am saying this so other's will not wonder where I am getting this. Your Ex's perception of reality, his health and environment e.g. "heart" and IBS problems, his obsessive and hyperverbal behaviors are typical for his disorder in adults, as well as his difficulities cooping with your son's diagnosis. As persons with this disorder age, their inappropriate behaviors often become worse and they also hook up with others to colobrate or mentor them in order to function. They can be very compelling and manipulative when presenting their side of the story and therefore may manipulate others to fight their defense because they cannot themselves, therefore either his new wife also may actually believe what he is saying and honestly believe that her involvement with the children is in their best interest, or she may have her own mental health issues. Proving any of this in court or even to a GAL may be difficult at best expecially if his diagnosis is not clear because there is little research into how adults progress with this disorder so it becomes your word against his word, dispite the evidence of his compulsion, he will have a compelling reason for his harassing Emails. A GAL is your best bet especialy since your son is disabled and you may be more effective pointing out that your son needs consistancey, routine and structure to effectively function, that means the same set of rules in both households because your son learns by rote and once learned will continue to do the same behavior right or wrong if that is the issue. What your Ex is proposing would undermine your son's treatment and development in addition to what he is doing to your daughter, that will be something both the GAL and the judge will be able to comprehend more so than the clinical implications of your Ex's disorder and his odd or eccentric and inappropriate behaviors, not that the evidence will not be important, but it is more important to focus on the best interest of both your children than degrading the other parent, let his efforts in that regard speak for themselves, the judge will only have to read a few of the stack of Emails to get the idea.
