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SARASOTA (CBSMiami/AP) — A woman has been sentenced to 25 years in prison after her 8-week-old infant was found buried near their Sarasota home.

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Kristen Bury, 32, pleaded no contest Wednesday to aggravated manslaughter in the Sept. 16 death of Chance Walsh, as reported by The Herald-Tribune of Sarasota. As part of a plea deal she must now testify against the child’s father, Joseph Walsh. He faces second-degree murder and child neglect charges.

Investigators say Chance was buried near their home in Sarasota before his parents left Florida to start a new life.

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After Bury was sentenced, Sally Susino told the judge her daughter lacks the “mother’s instinct to love and protect her young.”

Chance’s other maternal grandparent, John Murawski, called Bury a “monster” and said the child and his parents “slipped through society’s cracks.”

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