I'm a fly-by lurker... Question...do you have the option (with going through military courts as it appears you are going to be doing) to have a guardian appointed for your children? In "typical" courts, we have the option of appointing a Guardian ad litem when one party in the divorce clearly does not have the childrens best interests in mind. Review this link : http://www.divorcenet.com/states/georgia/ga_guardian ..while this is a georgia site, the description of the role of the guardian is pretty standard.
Your situation is beyond unique, and I am not here to pass judgment whatsoever. BUT..your children are going to suffer big time if he chooses to go this route and let the OW control him by the balls. It is unacceptable and YOU do NOT have to accept this for your children. I would seriously advise you to look into this . When my ex & I seperated, he moved in with an OW within a few weeks..obviously the relationship was going to fail..two married people (married to others..LOL)..when it did fail, it took me nearly 6mos to clean up the collateral(sp?) damage to my girls. Your children should NOT be around OW, certainly not for overnights & she has NO say in your arrangement. I'm not trying to hijack or offend, but you need to know there is potential for serious emotional harm to your kids here. A guardian appointed by the court creates a way for a 3rd party non-biased individual to keep their emotional health as a priority. Just my 2cents..best of luck to you..