A narcissist will often refuse to communicate through standard methods or will send hundreds of aggressive emails to overwhelm you. Your lawyer can request a "no-contact" order or mandate the use of a monitored parenting app. This limits the narcissist's ability to engage in emotional abuse while the legal case is pending, providing you with much-needed peace of mind. https://jmoorelegal.com/practice-areas/family-law/modification-of-child-support/