Prosecutors said Jewell, then 16, and Beames, then 15, planned to rob and kill the couple while they slept on Oct. 16. The couple said at the time of the shooting the girls planned to kill a third foster daughter who would not go along with the plan.
Jewell shot and wounded Robert Parker, who was sleeping, while Beames was to shoot Barbra Parker, but instead the girl ran away. Jewell held a gun to her foster mother's face, but the gun failed to fire because it was loaded with the wrong type of ammunition, prosecutors said.
Robert Parker has recovered from the gunshot wound.
The teens were sentenced as youthful offenders, Lohmann said. Should either girl violate any of the court's rules and conditions they will be transferred to the adult criminal justice system, he said.