A lawyer has entered not guilty pleas for a woman facing murder charges in the suffocation deaths of her three sons over a 13-month period.

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.

Pilkington was jailed in Bellefontaine (behl-FOWN'-tihn) in western Ohio on $1 million bond.

Chief Assistant Prosecutor Eric Stewart says she is on suicide watch.

Services were held Wednesday for Noah Pilkington, found dead at his parents' apartment Aug. 18.

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This story has been corrected to show the funeral for Noah Pilkington was Wednesday, not Thursday.