During the trial, Susan Edwards admitted the manslaughter of her mother but claimed she had been provoked. She claimed her mother had shot her father while she was staying with them, and during an argument afterwards said she shot her mother.
Christopher Edwards, who held a firearms certificate, told the court his wife only told him what she had done after they travelled to Mansfield by coach a week later.
He claimed they buried the bodies early on a Sunday morning after watching the Eurovision Song Contest on TV on May 9.
But prosecutors said the Wycherleys were gunned down for their money and buried the weekend before by both defendants.
The jury in the trial of Susan and Christopher Edwards took just six hours to convict them of murder.