The ex-husband of a bigamist accused of murdering her second husband in West Sussex, told the Old Bailey he had been a fool to trust her.
Dena Thompson, 43, denies murdering her husband
Electrician Lee Wyatt, 48, claimed Dena Thompson spun him a web of lies after their marriage and later tried to frame him for theft from the building society where she worked.
Dena Thompson, 43, of Larks Rise, Cullompton, Devon, is accused of murdering her second husband Julian Webb at the house they shared in Yapton, West Sussex.
Mr Webb died from an overdose of aspirin and anti-depressants on his 31st birthday in June 1994, while at the time it was thought to be suicide an inquest later recorded an open verdict.
Lee Wyatt told the court he spent years on the run believing Dena Thompson's story that the family were in danger from the Mafia.
Mr Wyatt claims while Mrs Thompson convinced him to move away and change his name, she bigamously married advertising executive Mr Webb.
Mr Wyatt said he had made a soft toy and believed Mrs Thompson when she told him they had been offered up to £50m for the rights.
Then she told him the Mafia had threatened to kill their son unless they handed over a share of the money, so he had to disappear while a new life was being arranged for them in America.
In 1994 he began to doubt her story, Mr Wyatt said: "I was there on the doorstep saying 'Where is the Mafia, where is the G'squad?'.
"I wanted the truth. The truth never came out, just lies time and time again."
He was divorced from her in 1997.
The prosecution alleges Mrs Thompson killed Mr Webb as she feared her double life was about to be exposed and she wanted his £36,000 death benefit.
They claim Dena Thompson tricked her husband into taking the drugs in small amounts in the last few days of his life by hiding the pills in food.
But Mrs Thompson claims he was depressed and may have taken his own life.
The trial continues.