(AP) — A Guide Rock woman accused of killing her boyfriend’s 68-year-old mother has pleaded guilty to a reduced murder charge.

Shelley Casterline pleaded guilty to second-degree murder on Wednesday in Adams County District Court. She and her 23-year-old son, Andrew, were charged with first-degree murder and other crimes connected to the Oct. 4 slaying of Virginia Barone at Barone’s home in Guide Rock. Her body was found partially covered by boards in her home the next day. An autopsy showed she’d been stabbed twice in the back and 20 times in the chest and torso.

Andrew Casterline has pleaded not guilty, and his trial is scheduled to begin on May 27. His mother’s sentencing is scheduled for June 10.

Authorities say the Casterlines were captured in Iowa on Oct. 5.