A woman who was stabbed to death by her ex-partner was under his "total control" during their 12-year relationship, a jury has heard.
Karen Brown, 39, and her new partner Kenneth Snell, 65, were found dead at his home in Cringleford, near Norwich, on 31 October 2009.
John Moody, 45, of Norwich, denies murdering them but admits manslaughter.
Ms Brown's father, Peter, told the jury at Norwich Crown Court she had to do whatever Mr Moody wanted.
She had moved in with her parents after a violent argument with Mr Moody which ended their relationship in 2008.
Giving evidence, Mr Brown said his daughter had come to him on the night of the argument "extremely upset".
He said she claimed Mr Moody had beaten her up and tried to strangle her.
On Thursday, the jury heard from Nadine Girling, Mr Moody's girlfriend, who said she bandaged wounds to his hands and legs on the night of the killings.
He told her he had been in a fight, she said.
The prosecution claims Mr Moody murdered Ms Brown and her new partner, Mr Snell, after being told of their relationship earlier that day.
The court has been played recordings of Mr Snell's and Ms Brown's 999 calls as they were attacked at his Brettingham Avenue home.
Post-mortem examinations showed Ms Brown sustained 13 stab wounds and 31 other injuries.
Mr Snell, who sustained seven stab wounds and 38 other injuries, died after being stabbed in the heart.
Mr Moody, of Kerrison Avenue, admits manslaughter on the grounds of diminished responsibility.
The trial continues.