A man was accused of killing his wife after introducing her to a lesbian partner that broke up their marriage, a court heard.According to prosecutors, James Kraig Kahler wanted to introduce another woman into the couple's sex life - leading Karen Kahler to begin a lesbian affair that he then blamed for the breakdown of their marriage.
A defence attorney for Kansas-based , who could face the death penalty if convicted, later dismissed that claim as 'a fantasy.'Kahler, 48, is accused of fatally shooting his estranged wife, her grandmother and the Kahlers' two teenage daughters.Accused: James Kraig Kahler, seen here in court in June, is accused of shooting his estranged wife, their two teenage daughters and the wife's grandmotherThey were killed the weekend after Thanksgiving 2009 in the grandmother's home near Burlingame, about 20 miles south of Topeka.Kahler's attorneys contend he had been mentally ill for months.Victim: Karen Kahler, was shot dead along with her two teenage daughters and her grandmotherThey say he suffered hallucinations and was obsessed with the relationship that his wife, Karen, had with another woman and her pursuit of a divorce.
Dan Pingelton, an attorney who represented Karen Kahler in their divorce, testified that she told him her husband introduced her to Sunny Reese of Weatherford, Texas.James Kraig Kahler and his attorneys say Reese broke up the marriage.
'Karen indicated to me that Kraig wanted to bring another partner into the marriage,' Pingelton testified during the criminal trial in Lyndon.'She indicated to me that Kraig wanted to do a threesome.'The victims of the shootings were: Karen Kahler, 44; her grandmother, Dorothy Wight, 89, and the Kahlers' daughters, Emily, 18, and Lauren, 16. At the time of the killings, Kahler was living in Meriden, Kan., northeast of Topeka.The Kahlers also had a son, Sean, now 12, who was at the scene of the shootings but fled without being injured.He testified Monday that he saw his father shoot his mother.Tragic: Emily (left) and Lauren Kahler were also shot deadDuring opening statements Monday, Haney said the Kahlers appeared to have a perfect marriage and family life for more than two decades before 2009, when the marriage became 'cancerous.'He named Reese repeatedly as the cause and said the two women conducted their affair openly, in front of the Kahler children.A settlement hearing in the divorce had been scheduled for early December 2009, with a trial set just days before Christmas. Karen Kahler had filed for divorce in January 2009 and moved out of the family home in March.'In a few months, it became fairly contentious, and it became worse as time went on,' he said.Haney, who has repeatedly described Kahler as a loving father and husband, suggested several times that Pingelton was speculating. Pingelton insisted his comments were 'an informed opinion.'At the time of the shootings, Kahler also faced a misdemeanor battery charge in Missouri, stemming from a March 2009 altercation with his estranged wife.
According to evidence presented in the capital murder trial, Kahler tried to hug her when she did not want to be touched by him.

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