The attack was witnessed by children, the court heard
A Vodafone executive was stabbed more than 30 times by her husband because she had told him she was seeing someone else, a court has heard.
Sally Sinclair, 40, was killed in the "ferocious" attack at the family home in Amport, Hampshire, in August 2008.
She was head of business analysis at mobile phone company Vodafone's world headquarters near Newbury, Berkshire.
Alisdair Sinclair, 48, formerly of Georgia Lane, Amport, denies murder at the trial at Winchester Crown Court.
The jury heard the couple's marriage had been strained for months over Mr Sinclair's "controlling and reclusive behaviour" which had left his wife with no bank account of her own, despite being the breadwinner.
The court was told he flew into a jealous rage at the news she was seeing someone else and attacked her with several knives in the kitchen of the luxury detached home they rented in Amport.
On the day of the alleged murder, 16 August 2008, Mr Sinclair was supposed to have responded to a divorce petition from his wife of more than 20 years.
The attack was partly witnessed by children, who cannot be named for legal reasons.
One child told police that Mr Sinclair stabbed his wife several times.
Another child who saw the attack had shouted: "Nobody has to get killed," at the pair, who were both seen brandishing knives at each other, the court heard.
The businesswoman was heard to say as the attack continued: "Alisdair, please do not do this. I will stop all this happening. Please do not do it."
Mr Sinclair replied: "It's too late for that now," the jury was told.
Christopher Parker QC, prosecuting, said: "Sally Sinclair wished to leave her husband. He could not bear to let her go.
"He had some simmering resentment and frustrations together with some suspicions that brought him to breaking point."
Mr Parker told the jury that Mr Sinclair had told police he had acted in self-defence as his wife had attacked him.
But the barrister told the court: "This had nothing to do with lawful self-defence.
"The evidence shows a sustained, ferocious and utterly one-sided assault upon his wife, who was terrified."
The trial continues.