Do not do anything that says or implies you are keeping him from his child, and certainly never put anything to that effect in writing. This will come back at you in the worst possible way. Knowing mine is a flake who cares only about himself, I told him from the get go in dozens of texts and emails that he can see the kids whenever he wants. I have been the one to say many times, when are you going to see the kids? If he tries to move for any custody, the status quo and his failure to step up will hurt him.