My dear.
We are Christians and meant to be the salt of the earth. But we need to also realise:
Proverbs 11:20, 25:28, 15:18, 11:20, 9:6-8, 6:17-19. Narcissists NEVER change. It's a disease. NPD. There is no cure. Only God can change them.
Even Christ said if the peace of people does not reflect on the disciples, they were to leave shaking the dust off their sandals and feet.
Try to be strong. Forgive. Pray for him. But protect yourself before it's too late. Go away when you can. They can stalk. Leave off social media posts. Go incognito and start a new life however difficult before it's too late.
Pls see this video:
God be with you. Praying for both of you. Take care.
Your sister in Christ.
Ps. I'm struggling with an 85 year old narcissistic father. Can't leave him as he's all alone after my mother's death and due to cultural situation. He's lived like this all his life and we have had to and continue to tolerate it
.
for you!, 
