A South Carolina woman has been sentenced to 20 years in jail for killing her 6-week-old baby when she breastfed while taking drugs.

Stephanie Greene, 39, had high levels of drugs, including morphine, in her system when her baby died of respiratory failure back in 2010. ABC News reports that Greene was convicted on Thursday of homicide and will spend 20 in prison.

Greene was formerly a nurse but lost her license in 2003 for substance fraud. That same year she lost custody of her two oldest children.

Greene reportedly remained emotionless during her sentencing.

According to the Associated Press, Greene’s current husband, who remained silent, remains to support his wife and will raise their now 7-year-old son alone while she serves her time.

Greene allegedly hid her most recent pregnancy from her doctor so she could continue taking her medication. Instead, she went to a gynecologist for care and didn’t tell that doctor about the medication she was taking.