An Alliston woman who stabbed her boyfriend through the heart stood before the court Tuesday and begged a judge not to send her to an adult prison. For the first time, in this case, the young woman, who pleaded guilty to second-degree murder, spoke before a Barrie court on Tuesday, reported PostMedia Network.

Fighting back tears, the woman said, “I am deeply sorry for what I have done and I know it was wrong… this apology won’t be enough to bring him back.”

She later said, “I am deeply ashamed and sickened by what I have done.”

The young woman also told the court today, “I have no desire to go back to the life I was living.”

Neatly dressed and articulate, the killer, who’s spent more than 3 years in a youth facility since her arrest and pleaded guilty to second-degree murder, also apologized to her dead boyfriend’s family.

“I have permanently damaged the lives of Steve’s family,” she said. “I am deeply ashamed and sickened by what I have done … I will always be haunted by my crime.”

The woman’s grandparents are hoping for the lighter sentence.

“We ask you to keep her out of the adult institution where she would be surrounded by adult offenders who have committed the most serious offences,” the grey-haired grandmother said in a broken voice as her husband stood by with his hand on her shoulder.

They told the judge how they raised her from the age of three because her parents were drug addicts in Toronto. Her mother later died of an overdose.

The Crown wants a life sentence in an adult prison with no chance of parole for seven years. The defence wants time served with up to four years of strict community supervision.

“If she were thrown into an adult prison with other adult offenders, it would be a disaster,” defence lawyer Jeff Hershberg said.

The killer, who cannot be identified under the Youth Criminal Justice Act, was 17 on June 23, 2012 when she flew into a jealous, booze-fuelled rage and grabbed a knife from a kitchen drawer and plunged it into Steve Garnier’s heart with such force it reached his spine.

With the knife in his chest, Garnier, 24, asked for a cigarette, then died a short time later as horrified guests at an Alliston house party looked on.

Earlier in the evening, the couple had been drinking and bickering because Garnier flirted with another girl.

Judge Michelle Fuerst will make her decision April 19 after the killer’s exams are completed.