Do you have any idea how different you sound from a year ago? The only thing I'd say is to make sure you follow up on the legal side of stuff. I'd hate to see him drag you and your girls down with him, and it sounds like that's where he's headed. Also, he owes your girls that support money. he might not have any, but you need to make sure the 'system' is looking out for you. (But while you are doing that, make sure you don't let it get you down and become about him. It sounds like you are past that, but I think it can be sneaky.)
It's hard to believe your little one is so old. It happens so fast.....
The mother thing sounds exciting. I don't think it is OT, it is part of who and what you are.
