I'll just restate what I said before: you guys need an agreed schedule with almost no changes.
I know she's the one who asks for the changes. I know you tried. But you need to try again. You need to do something that will settle this schedule. Involve a third party if need be.
Also, stop hesitating or agreeing to her schedule changes. You're training her to ask for them. She's rewarded for not following the schedule. I understand she's in a transition right now, but as soon as she settles, you need a permanent schedule (like week on/week off) that doesn't need to be agreed upon every few months.
These changes are not good for S12. He needs stability and predictability. He knows it's chaos between the two of you, he doesn't know what tomorrow will bring. He cannot project himself in the future. He doesn't know if his plans are going to change, whatever you promise him.
The fixed schedule will be good for her as well. She doesn't realize it now, but she'll be better able to plan her weeks and she won't have all this anxiety about asking for changes.
It's the same for you. You cannot make plans with confidence. You're constantly torn by her change requests. I've been there in the beginning and I feel much better now that it stopped. Now when WAW asks for a change (so far, only Christmas Holidays and summer vacations), I offer resistance if it's outside of the agreed schedule, at least so that she knows it's not granted. It reduces the requests.
That's just my two cents, but after several more weeks of drama around the schedule changes, I wanted to put it out there again.
