When her husband fell ill, she did not know what to do despite him telling her to pray. She then turned to the dark arts, and found a book containing a spell to trap a reaper and use its power. So she used it to save Roy and help him "heal" people. For the victims, she chose those she believed to be immoral. During the healing sessions she helped her husband.
Sam and Dean later figure out what she was doing, and Dean confronted her. In turn she called for help, and the police came to her aid. She told them she won't press charges and God will deal with Dean as he saw fit. Sam found her altar and destroyed it, but not before she chose Dean as her next target. She was stopped when Sam grabbed her amulet and smashed it. The Reaper turned on her and killed her. The next day, the town was told that she died of a stroke.