The father of three murdered children has denied asking his wife to have sex with their alleged killer, a court has been told.
Giving evidence in the Supreme Court in Brisbane on Tuesday, Vijay Singh vehemently rejected suggestions that in 2001 he encouraged his wife to sleep with Max Sica, who was then trying to date his daughter Neelma.
Sica, 41, is currently on trial for the murder of 24-year-old Neelma and her younger brother Kunal, 18, and sister Sidhi, 12.
Their bodies were found in the ensuite spa bath of their home in the outer Brisbane suburb of Bridgeman Downs on April 22, 2003.
Sica has pleaded not guilty to three counts of murder.
During his third day on the stand Mr Singh was again closely questioned about his sexual habits and those of his wife, Shirley.
The line of questioning further revealed some of the Singh family's "dirty laundry" that the crown has previously said would provide some context to the complex relationships of those close to the three dead siblings.
Mr Singh agreed that he and Shirley were swingers who met with other men and women for sexual trysts, and that he invited prostitutes to their home on two occasions.
Mr Singh conceded that Shirley, who ran a home massage business offering arousal rubs called "Kahunas", was sickened by the prostitute visits and cried about them.
He also admitted to having "two or three" affairs and to filming himself having sex with his nephew's wife.
He denied asking Shirley to sleep with Sica so she could later tell her husband about it during a phone sex session.
Defence barrister Sam Di Carlo said: "I'm suggesting to you that you asked Shirley to go and ask Max to have sex with her and then for her to phone you and let you listen while you were overseas."
"No," Mr Singh said.
The court heard Shirley also accused her husband of molesting two of his daughters.
Mr Singh denied these allegations.
"I did not molest any of my children," he said.
The trial continues.