The Brevard County woman convicted of starving her boyfriend's son and tying him up was sentenced to 40 years in prison on Friday.Sharon Glass, 50, could spend the rest of her life in prisonHear parts of the interviewIn court, Glass pleaded for mercy, tearfully telling a judge she's been a good person, a Sunday school teacher and that she needs forgiveness."I failed. I tried so hard, but the abuse that I suffered and the fear that I went through stole my courage, and I couldn't do it. I couldn't make the right decisions," she said.Watch this reportGlass continued to blame it all on the abuse she said she suffered at the hands of her boyfriend, Michael Marshall, the father of the starvation victim.In January, a jury convicted Glass of child abuse, neglect and false imprisonment after seeing the pictures of the starved 13-year-old. The boy only weighed 40 pounds when he was rescued.Investigators said Glass and Marshall would lock the boy in a closet or zip-tie him to a bed for days as punishment for stealing food."He was tortured. He was humiliated. He was embarrassed. He was forced to be put in a diaper. He was given coal for Christmas," said prosecutor William Scheiner.Judge David Dugan said in his whole career he had only seen two or three cases as bad as this one. He described it as "pure evil.""This was cold. This was calculated, and this was evil," he said.Marshall pleaded no contest to eight charges of child abuse, torture and false imprisonment last month. He will be sentenced next month.The child is with a new family and is happy and healthy, according to officials.

The Brevard County woman convicted of starving her boyfriend's son and tying him up was sentenced to 40 years in prison on Friday.

Sharon Glass, 50, could spend the rest of her life in prison

Hear parts of the interview

In court, Glass pleaded for mercy, tearfully telling a judge she's been a good person, a Sunday school teacher and that she needs forgiveness.

"I failed. I tried so hard, but the abuse that I suffered and the fear that I went through stole my courage, and I couldn't do it. I couldn't make the right decisions," she said.

Watch this report

Glass continued to blame it all on the abuse she said she suffered at the hands of her boyfriend, Michael Marshall, the father of the starvation victim.

In January, a jury convicted Glass of child abuse, neglect and false imprisonment after seeing the pictures of the starved 13-year-old. The boy only weighed 40 pounds when he was rescued.

Investigators said Glass and Marshall would lock the boy in a closet or zip-tie him to a bed for days as punishment for stealing food.

"He was tortured. He was humiliated. He was embarrassed. He was forced to be put in a diaper. He was given coal for Christmas," said prosecutor William Scheiner.

Judge David Dugan said in his whole career he had only seen two or three cases as bad as this one. He described it as "pure evil."

"This was cold. This was calculated, and this was evil," he said.

Marshall pleaded no contest to eight charges of child abuse, torture and false imprisonment last month. He will be sentenced next month.

The child is with a new family and is happy and healthy, according to officials.