What caused my wife to die wrong thinking and wrong acting.

My wife was Jealous and would get angry quick, the root of Jealousy is fear, she had a fear of death also fear of losing me. She never thought she was good enough for me and that someone would take me away from her, yet she was a beautiful woman and men admired her even flirted with her but the way she was raised as a virtuous woman she couldn't see men were flirting and infatuated with her, her mind never went there for she had eyes only for me, even though I called her the wife of my old age the devil tormented her even though she was saved and filled with the Holy Ghost, only Gods word can get rid of fear for you. For out of the overflow of the heart the mouth speaketh, whatever is in your heart will get in your mouth. She depended on my faith she leaned on me i kept her her until her heart failed because of fear and anger.
Pro. 18-21-23 Death and life is in the power of the tongue