How do you be a disciple for God to spread his word when its people like this....?

I do in home care. and the woman is 55 and lived a very bad life and now gets a caregiver. but bad as in meth and drugs and satanism and I know I was put into her home for a reason. but she goes from being all about the coolness of her old life to i know i am Gods child and he forgives me for everything and anything because I am his child. then goes into talking about being able to make 1 phone call to have anyone killed. She has made me come home to tears. And holding my child and not understanding how I am supposed to handle this. But I know God would want me to help the mind of this woman. And advise? please be kind, I have had a rough day. God bless you. Thank you.