A former stripper is challenging her jail sentence for the murder of her ex-boyfriend, claiming she should spend less time behind bars as his dumped body had not been mutilated and 'extreme violence' was not involved in his death.

Robyn Lindholm pleaded guilty to murder after enlisting her lover Torsten Trabert and John Ryan to kill Hawthorn gym owner Wayne Amey on December 10, 2013, the day before he was due in court to address a property dispute he had had with Lindholm.

Trabert is also appealing his sentence, with his lawyer arguing that while Lindholm, 43, had a "primary motive" to kill Mr Amey, his client's motive was "put very simply, your honour, sex", the Court of Appeal was told on Thursday.

Supreme Court Justice Lex Lasry sentenced Lindholm to 25 years, Trabert to 28 years and Ryan to 31 years imprisonment for Mr Amey's murder last year. All three are appealing their prison terms.