Wife-killer Malcolm Webster wants to be buried in the same grave as the woman he murdered.
Tragic Claire Morris's family, who endured the agony of losing her in a staged fireball crash, were sickened when they learned of the twisted killer's plan.
And they have accused Webster of planning the "final insult" to his first wife, who died 17 years ago at the age of 32.
Webster - who also tried to kill his second wife and is suspected of plotting to kill his fiancee - insists on remaining the owner of the Aberdeenshire grave where Claire is buried, despite having murdered her.
That will give the Black Widower, who is to be sentenced on July 5, the right to be buried alongside his victim.
Claire's brother Peter Morris said last night: "I hope he gets 30 years and dies in prison. But I don't want him to die having sorted out that he's going to be buried with Claire.
"That would be the final insult in the whole saga - that I was never able to separate her from him."
Peter wanted Claire's headstone changed to her maiden name - but was told he'd have to seek the killer's permission.
He has now learned Webster is maintaining his right to be buried alongside his wife as spouse and owner of the lair.
The killer's lawyer told him that Webster, 52, believes that giving up his ownership could be interpreted as a partial admission of his guilt.
Peter added: "It just feels vile that he could be with her in death. But it's the kind of sick thing that he would do. It's disgusting that he could be buried with her even though he's her murderer."
Peter, 48, is now exploring the legalities of having his sister's body exhumed from her resting place.
He is also contemplating a challenge to Webster's ownership of the lair in Tarves.
Peter added: "A council official confirmed to me that Webster was entitled to be buried beside Claire.
"If Webster has the ability to be buried with Claire, it changes my position to one of now wanting to get Claire out of there.
"So I'm now having to look at the laws of exhumation and getting her remains back down to her home village in Kent. Claire did love Scotland, which was one of the reasons I didn't want to move her. Also, our mother is 86 and I didn't want to put her through a second funeral.
"But it seems that Webster even has rights over Claire's actual remains, which is incredible. I may have to try to get an amendment to the human rights of prisoners' laws.
"If, for instance, Webster owns a house, he could have that seized and the money used to compensate his victims.
"In the same way, why couldn't he have Claire's lair taken off him? In a sense, it's an asset he has ownership of.
"I'm utterly convinced this is the one thing Webster is holding on to at the moment. He'll battle the whole way because I know what he's like - he's a tenacious little b*****d."
Peter added: "I fully expect an appeal against his conviction."
Claire, a nurse, died in a late-night road crash near Oldmeldrum in 1994, less than a year after she married fellow nurse Webster, who pocketed a fortune in insurance after her death.
But it took until last month for him to be brought to justice for drugging her then running their 4X4 off the road and leaving her to burn to death.
He was also convicted at the High Court in Glasgow of attempting to murder second wife Felicity Drumm in a similar staged crash in New Zealand.