WHEATON – A suburban Chicago woman stabbed her 7-year-old son 100 times because she was angry with her husband and a 5-year-old girl about 50 times because she witnessed the attack, as both children prayed and begged for their lives, prosecutors said Thursday.

DuPage County State's Attorney Robert Berlin said Elzbieta Plackowska, 40, told investigators several stories, at first blaming the attack on a stalker who got into her home in Naperville. She later said the children had evil inside of them and she was fighting the devil in the house, Berlin said at a bond hearing.

Plackowska eventually admitted that she was angry with her husband, who works as a truck driver and is often gone, because he left her alone to care for her son, Justin, and work as a maid, which she felt was beneath her, Berlin said.