Talaniman Rule- Take care of your last relationship, heal from it, before you jump into the next one.

You are both violating this rule, and will have drama, and confusion, and conflict, until you solve your past issues.

Plain and simple. You should stay out of each others business and handle your own.

We brought up kids when you mentioned his,and in a cold way "he should call before he brings him over here"
Let me change that not cold,maybe you just want to know so you can prepare a dinner for everyone,so no one is going to question you on you'r children we are just trying to put together a story in our heads based on what you tell us,
So if you said,
He needs to call when he's bringing his son here because I am very busy with my kids,cooking,cleaning I just need to know when there might be one more for dinner or something like that?

But that is not how you came off