NAMPA, Idaho (AP) — A 34-year-old Nampa woman has pleaded guilty to voluntary manslaughter for the October stabbing death of her boyfriend during an argument. The Idaho Press-Tribune reports Susana Cordoba Quijano also pleaded guilty to use of a deadly weapon in the Oct. 12 death of Santiago Delgato Pineda. He died of a single stab wound to the heart. Quijano was arrested the next day. She was initially charged with second-degree murder. Court records say Quijano told investigators she stabbed Pineda because she suspected he was seeing another woman. Sentencing is set for April 22 before District Judge Juneal Kerrick.