An appeal by Mairead Philpott against her sentence for the manslaughter of six children is underway at Nottingham Crown Court.
Speaking exclusively to ITV News, Dawn Bestwick said jail wasn't good enough for MIck Philpott and that "as a coward" he "deserved to die".
The judge has delayed her sentencing to "reflect further" on the trial Mick and Mairead Philpott and friend Paul Mosley.
Judges have dismissed Mairead Philpott's appeal to have her 17 year sentence for the manslaughter of her children reduced.
Jim Duffy, Mairead Philpott's father, told reporters that he was happy his daughter's appeal for a reduction of her 17-year sentence was rejected and described today's hearing as "a waste of money'.
– Mairead Philpott's father
She should have just got on with the sentence she got. Those children got no chance of appeal - why should she have got a chance?
She may have been dominated but at the end of the day she was the children's mother.
...She's my daughter, there's love there but I'll never forgive her for as long as I live for what she has done.
"This sentence cannot be criticised" says The Lord Chief Justice #Philpott
Mairead Philpott has lost her appeal to have her 17-year sentence reduced for the manslaughter of her six children.
Mairead Philpott has had her appeal against her 17 year term for manslaughter of her six children dismissed at Nottingham Crown Court.
Richard Latham QC, prosecution for the Crown, has argued Mairead Philpott had petrol on her own clothing and was therefore not a "mere spectator".
Prosecutor Richard Latham QC has told the court at the Mairead Philpott appeal hearing, "While we understand her grief at the deaths of her children. But there was a plan here - hatched over a period of time that Mairead Philpott was aware of before the fire....she wasn't a mere spectator."
Mairead Philpott's barrister, Shaun Smyth QC, has told the court "Those unfurnished with the whole facts are sharpening their pens against Mairead Philpott. We know this (appeal) will not find favour with those who advocate the purpose of sentencing is for vengeance and retribution."
The defence barrister for Mairead Philpott has said her husband, Mick Philpott, targeted women who were incapable of standing up to him.
He then suggested Mairead Philpott was 'the neediest of them all' and could not 'summon the courage' to leave him.
Mairead Philpott's barrister Shaun Smith QC described her and other women as "utterly dependent" on Mick Philpott.