Emma-Jayne Magson has been allowed to appeal against her convictionCredit:Joe Giddens/PA The mother of a young woman who killed her abusive partner believes her daughter should have her murder conviction quashed in the wake of Sally Challen’s appeal.Joanne Smith, 48, is “hopeful” that Emma-Jayne Magson, 25, will win an appeal, expected later this year, after being convicted of murdering her boyfriend in March 2016.“I was so happy [when Sally’s conviction was quashed],” said Mrs Smith, who was in court last week to support Mrs Challen.“I felt so emotional and thought, ‘One day that might be my daughter.’“I was a bit happier when Emma was granted an appeal, but this has given me so much more hope.”The case of Magson, the mother of a four-year-old daughter, has parallels to that of Mrs Challen, 65, whose conviction for murder was quashed by the Court of Appeal this week.The former Police Federation office manager killed her husband Richard with a hammer in 2010.Magson, a former care worker for Bupa, stabbed her boyfriend, James Knight, 26, in the chest during a drunken row in which he had grabbed her by the throat, hit her, ripped her clothes, and thrown her to the floor. At trial, she was painted as “cold, brutal, and manipulative” for not calling for medical help after she stabbed him. Knight died hours later. She was convicted of murder at Leicester Crown Court in November 2016 and sentenced to 17 years in prison.But her family believe she was acting in self-defence and that she was not in her right mind.Mrs Smith said the trial did not address the abuse to which Magson had been subjected. She was vulnerable and had recently suffered a “traumatic” miscarriage, she said.“Emma is grieving for the baby she has lost and for her boyfriend, who she didn’t mean to kill,” said Mrs Smith. “It would mean the world if she could come back home to her little girl.”Justice For Women, which supports Magson and Mrs Challen, is working on 10 similar cases, including that of Farieissia Martin, a mother of two, who was convicted of the murder of Kyle Farrell, her violent partner, when she was 22. Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily Front Page newsletter and new audio briefings.