Keep a diary of everything the happens and what he says, including threats. Make note of his holidays etc, as well as your expenditure re: the kids- in fact the more accurate information that you can give your solicitor, the better. Keep it in a book or whatever and keep a copy. Don't take the bait, he sounds like a bully. Practise being calm, show him you won't be pushed around but keep your distance. Like it or not, he has to negotiate with you - not just threaten- be effective about your's and the kids future. You will get through this!