When he spews something false about you, I'd just say thanks for sharing and don't engage. Who cares what he thinks? Plus, as Bond says, don't validate bad behavior. Just listen and move on. You don't have to give him everything he wants in court in order to have peace. Keep your standards and what you need to get for the kids. You can still press for fairness in any D without spewing hate or always thinking about attacking him. The two are different. Just treat him like a crazy uncle and don't engage. But be civil and pleasant when he's around.
