The only thing I would add to the previoius comments is please don't give in to any temptation to say anything abd about your ex to the kids. It may take them some time to figure out how they feel about whom, but you will only hurt yourself and your kids if you say bad things about their dad. Share anything you want to say here and in the end your kids will thank you for not making them feel they have to choose sides. Because no matter what happens, he will still be thier dad and they will respect you for respecting their relationship with him. I know this can be hard especially when he's saying awful things about you, but in the end it is the right thing to do and eventually everyone will figure out that it was you who took the high road.