My mother is depressed and says she wishes to die. What can I do?

Mom says she would do it if she wouldnt go to Hell. She has a lot of pain in her hands and knees. she is under the care of a doctor. Tried several medications. I sugessted laser therapy. She is stubborn. She and my Father have problems in thier marriag for a long time now. My Father is at his wits end. He ask me to get some advice on how we can help her. No one can do or say anything right. She crys a lot, I understand why she would be depressed, but I can not make her do anything. If we could convence her to possibly have an in home caregiver to come and help talk to her and work with her doctor would that be a good first step? She has Insurance.