Katherine Knight was Australia's first woman to ever be sentenced to life without parole.  She slaughtered her boyfriend John Price and served him for dinner to his children.

References:

Bovsun, Mara (5 October 2013). "How an Australian woman butchered her boyfriend and removed the skin from his body". Daily News. New York. Archived from the original on 20 October 2013. Retrieved 23 November 2013. 

Sutton, Candace (22 July 2017). "Queen Bee: Cannibal killer Katherine Katherine's life in prison where she's known as 'The Nanna'". News.com.au. Retrieved 20 January 2024.