What happens next?

How to help your child when the other parent is a narcissist
Limit your contact with the narcissistic parent.
If you and the narcissist have split up, your best option is to minimize your communication with your child's parent. Narcissists are generally high-conflict people.
To prevent exposing your child to a battle they can't understand, limit interactions between you and the other parent as much as possible. Speak to the narcissist only when absolutely necessary and keep the subject of your communications strictly related to parenting.