Authorities say Brittany Pilkington confessed to killing her 3-month-old son last week, a 4-year-old brother in April and a baby brother last July.
The Logan County Prosecutor says the 23-year-old Pilkington was jealous at the attention her husband paid the boys over her and their young daughter. Pilkington's attorney entered the not guilty pleas at a hearing Wednesday. If convicted, she could get the death penalty.
