Talk to Psychologist on Pathologic/compulsive Lying

I have abserved my mother lying very frequently also her lies are sort of extreme doing allegations on others mostly my father and his family. She does not believe even if someone try to tell the truth and also she believes what she say is right. She will never accept to see a doctor or accept herself at fault. How can i make her see doctor? And one more thing that, there are many underlying causes that make her so defensive towards herself. She had been a very strong and struggling women in her life but now she is losing herself in superstitions and allegations.