A Scientology spokesman informed the press that she had been left "a very generous provision" in her husband's will, though the details were kept secret. Mary Sue Hubbard continued to be active in Scientology well into the 1990s; in a 1994 Scientology magazine, she was listed as a "Patron" of the International Association of Scientologists, indicating a donation of $40,000. In December 1995, Hubbard had a mastectomy of her left breast. In 1998 she was diagnosed with metastatic breast cancer in addition to her existing chronic obstructive pulmonary disease (COPD). Mary Sue Hubbard died on November 25, 2002, aged 71, at her home in Los Angeles. Her body was cremated two days later and her ashes were scattered at sea off the California coast, where L. Ron Hubbard's ashes had similarly been scattered in January 1986.