There are no examples of a woman killing her children, mother, father and herself in one go.
Liselotte Leifeld was a German who killed her mother, her husband, and their four children in Ahlen, West Germany on September 23, 1969, before committing suicide. All of them were shot in the head, or chest with a 6.35-caliber pistol
Emma Cooper was an American who killed six members of her family and wounded a seventh in Cadillac, Michigan, United States on June 12, 1908, before committing suicide
Kathryn Dempsey Schoch was an American who killed six of her relatives and wounded a seventh in Dunkirk, New York and Pittsburgh, Pennsylvania, United States on December 22 and December 23, 1934, before committing suicide
Elizabeth R. Gregor was an American who killed her husband and five children in Prospect, Pennsylvania, United States on June 17, 1963, before committing suicide
Julia A. Johnson Markham was an American who killed her seven children at a farm seven miles southwest of in Cambridge, Illinois, United States on September 30, 1905, before committing suicide.
Mary Sartin was an American who killed her husband and five children in Bay View, Ohio, United States on August 13, 1965, before committing suicide