Philanthropist and mother of Elisabeth, James and Lachlan Murdoch died at home in Palm Beach, Florida

The author and philanthropist Anna Murdoch-Mann, the ex-wife of the Australian media tycoon Rupert Murdoch, died at her home in Palm Beach, Florida, on Tuesday. She was 81.

Murdoch-Mann’s death was reported Friday by the New York Post, one of her ex-husband’s media properties.

During 31 years of marriage, Murdoch-Mann was reported to have played an active role in the building of Murdoch’s media empire, News Corp. She and Murdoch also had three children: Elisabeth, James and Lachlan, who is now the chair of News Corp.

The pair split in 1998 after Rupert Murdoch’s affair with Wendi Deng, who became his third wife. Murdoch-Mann said she was forced off the News Corp board in the wake of that split.