My therapist told me my narcissist husband would never change. He’s been lying to me for 22 years, left me last year & tries to turn my children against me just to hurt me. I think you’ll be better off without him honestly.

Thank you so much for your honest opinion...How can I convince for mutual divorce without my Narcissist husband causing harm to me and also provide child custody to me ?

You and your child are better off without him. He will NEVER change despite how much he promises. Move on while you can.