Sweetbriar, I'm glad to see everything went okay at the lawyer's office. Of course, they want to settle out of court...it's quicker, easier and yes, less money spent on fees. Make sure you are getting what you need for you and your children to survive and make sure that the unborn child is mentioned in the decree for child support as well.
He is like a child when you tell them no, they will still test your boundaries and do it. He is manipulating your child into getting his way. He knows that the way to get to you is through your children.
As for him coming back and staying one night a week...I don't think so. He is telling your child these things so that they will get back to you. He's trying to make you react and start communicating again w/him in a heated manner. Whatever you do, count to ten and do not contact him. Stay NC. It is better for you mentally and emotionally right now.
You made it through Halloween. Today is a new day and it's time to start thinking about you and what you need to get through the next few months until the baby is born.
Just remember...you didn't break him, therefore, you can't fix him. Do not drink the Koolaid he is trying to sell you.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.