A woman was branded "manipulative and wicked" as she was jailed for 18 years by a UK court for killing the eight-year-old daughter of her lesbian lover in east London after brainwashing her into believing her child was possessed.
A judge at the Old Bailey handed Kiki Muddar, 43, the "lion's share" of responsibility for the misery inflicted on while also jailing the girl's mother Polly Chowdhury, 35, for 13 years.
Both women were convicted of the manslaughter of Ayesha whose body was found at their home in Chadwell Heath, covered in more than 40 injuries, including a bite mark and carpet burns.
Their trial heard that Muddar created a fantasy world of alter egos on Facebook and text messages to seduce Chowdhury and turn her against her daughter because she saw her as a threat.
Sentencing them, judge Christopher Moss QC said Muddar "tore" apart the family when she entered their lives.
He told her: "You inhabited an extraordinary fantasy, fictional world of deceit and lies and you determinedly immersed Polly Chowdhury in that world. You clearly developed a deep hatred of little Ayesha.
"So it was that, in the months leading up to her death, Ayesha was subjected at the hands of both of you to a life of cruelty and misery that defies belief."
The judge said it was "despicable" how Muddar had threatened and manipulated Chowdhury and made Ayesha's life a "living hell" in the months before her death.
He told her: "You are a manipulative and wicked woman who deserves condign punishment for your crime."
Turning to Chowdhury, he said: "You were Ayesha's mother, whom she trusted and was entitled to expect that you would protect her from harm rather than take part in inflicting it upon her.
"You were in a fundamental position of trust in which you disgracefully failed."
Judge Moss also paid tribute to the "courage and personal restraint" of Ayesha's father Afsar Ali who as a witness had to learn for the first time the disturbing details of how his daughter died as the case unfolded in court.
He highlighted the painstaking police investigation which discovered a situation which could only "astonish and horrify" anyone listening to the trial.
While the judge said the evidence made it clear that Muddar was responsible for inflicting the fatal head injury to Ayesha, they had both taken part in the abuse, which involved terrorising Ayesha in the night by wearing "vile masks".
Earlier, in mitigation, Chowdhury's lawyer, Ali Bajwa QC, said Muddar was the driving force of the abuse leading up to Ayesha's death.
While his client had been a "model mother" before she met Muddar, she was "skilfully and mercilessly" exploited by the older woman.
Mr Bajwa added: "She was brainwashed entirely - brainwashed into thinking that treatment was necessary."
The trial had heard how Muddar brainwashed Chowdhury into believing that Ayesha was possessed and needed to be physically chastised.
She told the solicitors' admin worker that Ayesha was "evil" and had "bad blood", and repeatedly encouraged her to discipline the child.
Muddar bombarded her with more than 40,000 texts, telling her: "You have no right to ever love or like your evil daughter."
In a recorded phone conversation with a friend the month before the killing, Muddar described Ayesha as "pure evil" and a "witch" and threatened to drown her in the bath.
Days before the killing, the couple, who were both horror film fans, terrorised Ayesha in the night by taking it in turns to wear a scary mask.
A neighbour heard the little girl screaming, sobbing and then pleading with her mother: "Amah, I don't want to be bad, Amah, Amah, I don't want to be bad."
They also made her write a list of things she had done wrong, which included "huffing and puffing", "telling lies" and "being rude".
The abuse came to a head on August 28, 2013 when Ayesha was killed. Chowdhury told the court that Ayesha was hurt while Muddar was giving her a cold bath as punishment for wetting herself.
However, Muddar's defence was that she spent the night at her parents' house, although a pathologist said she could have died hours before.
On the morning of August 29, Muddar returned home and dialled 999 to report Chowdhury had tried to kill herself and that Ayesha was dead.
Paramedics discovered the child "cold and stiff" in her bedroom, dressed only in a pair of pink pants. Although the cause of her death was a head injury, she had suffered more than 40 injuries, including a bite mark and carpet burns.
Chowdhury had left a series of notes, appearing to admit to the killing, saying: "I have taken my life and Ayesha's life".
Meanwhile, Muddar reacted dismissively when she told a paramedic: "She was a naughty child and mum thought she was possessed by the devil."
During the course of the investigation, police uncovered Muddar's web of deceit and lies when the recovered her recorded phone calls, text messages and Facebook messages.
Among her fake personas was Chowdhury's cyber boyfriend Jimmy who she pretended she was channelling when the couple had sex, and a Muslim spirit guide, Skyman, which she used to prey on Muslim Chowdhury's religious belief in ghosts and messages from beyond the grave.
Muddar, of Green Lane, Ilford, and Chowdhury, of Broomfield Road, Chadwell Heath, both denied murder, manslaughter and causing or allowing the death of a child between March 1 and August 29 2013.
In a witness impact statement, Mr Ali said his "world fell apart" the day his daughter died.
He wrote: "The two people Ayesha trusted and loved were the very people who took her life.
"When my princess died, a part of our lives died too. In my heart our princess Ayesha will remain forever."
The court heard Chowdhury tried to keep him away through court orders at the time she was abusing Ayesha.