' before he was found dead from carbon monoxide poisoning

Carter 'had sent Roy, 18, a series of texts encouraging him to take his life

A teenager who allegedly encouraged her friend to kill himself last year has enjoyed her senior prom and a trip to Disney World while awaiting her manslaughter trial, it has emerged.

Michelle Carter's mother, Gail Carter, has been posting images to her daughter's social media pages showing her on trips and hanging out with friends - activities her alleged victim, 18-year-old Conrad Roy III, will never get to do, his aunt has said.

'We will never see him enjoy these milestones,' Becki Maki told the Boston Herald.

'To see her awaiting her manslaughter trial on a trip to Disney World with her friends, going to school competitions and going off to prom - it just seems like she doesn't understand the gravity of the actions that have led to the case against her.'

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Michelle Carter, pictured in juvenile court in April, has been enjoying trips to Disney World and nights out with friends ahead of her manslaughter trial - leaving her alleged victim's family hurt and confused

Carter, 18, was charged in February with involuntary manslaughter in the death of Roy, who died of carbon monoxide poisoning in his truck in a Kmart parking lot in Fairhaven, Massachusetts last July.

She faces 20 years behind bars if convicted.

Police and prosecutors say the pair, who had met on vacation and attended different high schools, exchanged more than 1,000 text messages in the days and hours leading up to his death.

But the night before he died, she texted a friend saying: 'I'm losing all hope that he's even alive.'

Meanwhile she also allegedly messaged Roy: 'Let me know when you're gonna do it.'

According to the police report: ' When he actually started to carry out the act, he got scared again and exited his truck, but instead of telling him to stay out of the truck... Carter told him to "get back in". '

Accused: Carter, left, allegedly encouraged her friend Conrad Roy III, right, to take his life last July in a series of text messages. He was found dead by carbon monoxide poisoning in his truck

Support: Carter's parents Gail and David, pictured in court, have denied she committed a crime

His body was found in the truck after his parents reported him missing, and police found the text messages after looking through his phone.

But after his death, Carter expressed her heartbreak on her Twitter page and even organized a suicide prevention fundraiser in his name.

'Such a beautiful soul gone too soon,' she wrote on the day of his death. 'I'll always remember your bright light and smile. You'll forever be in my heart, I love you Conrad.'

Three days later, she added: 'I will never understand why this had to happen.'

After her arrest, Carter, a senior at King Philip Regional High School, was banned from social media by a judge but her mother has been updating her page with images, Roy's aunt said.

'With her mother posting things to social media for her, it doesn't feel like a ban,' Maki told the Herald. 'It just doesn't feel like she's grieving - and that's really confusing for us.'

Tribute: In the hours after he was found dead, Carter shared this message to her Twitter page

Honored online: Just two days before her arraignment, she shared this image of Conrad, adding: 'Really missing you tonight'. She is free on bail but has been ordered not to touch her social media pages

Carter's attorney, Joseph Cataldo, said that the teenager was not violating the court order and was simply continuing 'with her day-to-day activities and her life'.

Following a court appearance in April, he said that Carter had not committed a crime and that they will prove Carter was actually trying to help Roy.

'Taking all the texts in context, she tried to talk him out of it,' Cataldo said, The Sun Chronicle reported. 'He caused his own death. She doesn't understand why she is being prosecuted.'

Roy, a stand-out high school athlete who worked for his family's marine salvage business, had previously tried to commit suicide over a year earlier and was battling depression.

Carter will appear in juvenile court on June 9 for a pretrial hearing.

• For confidential help, call the National Suicide Prevention Lifeline at 1-800-273-8255 or click here