TWO Perth women who lured 18-year-old Aaron Pajich to their house and stabbed him to death in a thrill killing have been jailed for life.

Jemma Victoria Lilley, 26, a would-be serial killer, and her housemate Trudi Clare Lenon, 44, a mother of three with an interest in bondage, will not be eligible for parole for 28 years.

Pajich had trusted Lenon because he was friends with her young son and WA Supreme Court Justice Stephen Hall said the women’s crime was morally repugnant and would create feelings of “horror and revulsion” in right-thinking people.

Aaron was murdered in June, 2016 when the pair lured him to the home they called “Elm Street” after the cult horror movie series A Nightmare on Elm Street — and fatally attacked him with a knife.

His body was found buried in the backyard of the property on Broughton Way, Orelia under a freshly laid slab of cement that was covered in bright red tiles.

He had sustained stab wounds to his chest and neck, and appeared to have been garotted.

The court had heard Aaron, who has autism, had never met Lilley, but met Lenon, through her teenage son, who he was friends wit.

He also studied at the same TAFE as Lenon.

Lenon and her children lived with Lilley, a 26-year-old who had been obsessed with murder for much of her life.

The court was told Lilley maintains her innocence and intends to appeal.

HORROR TRIAL

The pair were found guilty by a Supreme Court jury last November after a disturbing trial in which they blamed each other for Aaron’s murder.

The court heard Lilley, obsessed with serial killers, had written a book about her depraved fantasies, and boasted of the murder to a work colleague.

Ahead of the murder, she had told a friend and written about her growing desires to take a life, something she wanted to achieve before her 25th birthday.

She was fixated by sharp knives and her pet name from Lenon was SOS, the same name she’d given a character in a dark book she wrote as a teenager.

The pair brought cleaning products and concrete in the lead-up to the murder during trips to Bunnings. The trips were also used to buy 100 litres of hydrochloric acid which they likely planned to use to dispose of Mr Pajich’s body.

The night before the murder, Lilley texted Lenon that she was feeling “things I haven’t felt before. It’s incredibly empowering”.

The trial heard Lilley attacked him from behind soon after her arrived. She overpowered him and tried to strangle him with a garrotte before Lenon joined the fight. She held him down while Lilley took to him with a knife stabbing him to death.

Once he was dead they wrapped his body in a locked room. He was later buried in their back yard.

Earlier this year, as the pair awaited sentence. Lenon was attacked as she waited in line for medication at Bandyup Women’s Prison.

A female inmate poured freshly boiled water over her back, shoulders, breasts, neck, arms and fingers, causing severe burns.

Boxer Danny Green praised the inmate behind the attack, labelling Lennon and Lilley as “mutts” in a Post on his Facebook page.

The post received a comment from Veronica Desmond, Aaron Pajich-Sweetman’s mother, who wrote: “Thank you for your support Danny. I’m Aaron’s mum and life is very difficult now much more than it was.”