Hi R.,
First of all hats off that you are trying to keep a sensible relationship with your soon to be ex. It seems that he has not come to grips with the break-up. That is unfortunate for him. You don't have to alienate the children because of him. The kids will always keep a relationship with their dad. If he wants more and even if you told him no, just let the kids talk to him. You really don't have to say anything to him unless it is regarding the kids. Keep all topics when talking to him about the kids. After my divorce, it was difficult for me because the break-up was very bad. But after 4 years of dust settling, My ex and I do talk especially for our son sake. I don't talk about anything except my son. He does the same. My son lived with me first and after 3 years he now lives with his dad. I don't go out my way to talk to him unless I am concern about my son. For you, since you too have split the children living arrangement you will be talking more for the sake of the kids, but don't let that keep you from moving on. Start living for you and the kids. Once he realizes you are standing on your own two feet, he will come to grips. Limit your calls and visit to him regarding the kids. If you are going to pick up the kids that live with him. Wait in the car and send the other kids to get them or have the kids wait outside. This will assist in not interlocking in a unwanted conversation. Also if he comes to pick the kids same applys. Your house will have to be respected. He has to ask to come in, again unless it is regarding the kids, he can't just come by and visit. I hope things will continue to be peaceful for you and the kids. Be strong and be happy. Take care and Good Luck.