Chapter 3. Let the detachment begin

[Zues126]

That would save time if S10 is out or I have guests etc.

I don't like this addition. It suggests that you need a reason to not be interrupted. You don't need an excuse, it is your family time, that's it.

I'm assuming the issue right now is that there isn't clear parental time. Maybe that's a better way to address it. Like:

The children need their mother and I want to support your relationship. At some point that will probably look like a schedule that defines what our parental time is and ensures the children have a life with both parents. For now we need to work that out between the two of us. I can't have you dropping by unannounced as that is a disruption to the evening I have planned with the kids, so please communicate with me ahead of time so we can find a way to make sure you get the time you all need. Thank you.