Can I keep my kids away from my ex’s new partner?

If that person’s behavior damages your children, heck yes. If you’re just jealous or mad, heck no. Here’s how you know the difference. I have my clients specify behaviors that they won’t engage in or allow others and the kids to engage in. If somebody is doing one of the prohibited behaviors, that person is excluded objectively—not for being the ex’s new partner but for violating the covenant that applies to everyone.