The attack was witnessed by children, the court heard
A child has told a jury how a Vodafone executive who was allegedly stabbed to death by her husband was "coated in blood" after the frenzied attack.
Sally Sinclair, 40, was head of business analysis at mobile phone company Vodafone's world headquarters near Newbury, Berkshire.
She was killed at the family home in Amport, Hampshire, in August 2008.
Alisdair Sinclair, 48, formerly of Georgia Lane, Amport, denies murder at the trial at Winchester Crown Court.
The youngster, who cannot be named for legal reasons, recounted the events in a recorded interview played to the jury.
The child said the couple had started arguing in the afternoon before "a massive scream" was heard and the couple were seen with knives drawn at each other.
The child described to the court seeing Sinclair stab his wife several times. At one point Sinclair shut the door to the kitchen where the fight, which lasted about 20 minutes, was taking place, the court heard.
The witness said Mrs Sinclair was in the kitchen "coated in blood" and described how Sinclair was also covered in blood that spread around the house as he moved around.
Earlier Mrs Sinclair's mother, Nikki Alford, told the court that she did not get on with her son-in-law and never felt welcome in the house.
The couple rented the secluded detached house in Amport
She told the court her daughter had contacted her asking to meet up in July last year.
She said: "Basically she just told me she wanted a divorce. I believe she had not mentioned it to Alisdair but she said she was going to see a solicitor about it.
"We talked about her moving out and she said she could not because she had no access to money."
Wiping away tears, Mrs Alford continued: "I sat her down at my computer and helped her set up a bank account of her own at the Smile bank."
The mother said she saw her daughter for the last time in the week before her death when she explained she had got further with the divorce and that a solicitor had sent a letter to Sinclair and he had to respond to it.
"She said he could have all the money, keep all the cars, she just wanted to be free.
"He was not interested in any compromise. He wanted her to stay. He wanted to keep her and the cars - everything."
Mrs Alford said she suspected her daughter was having an affair but it was never mentioned.
The court was told Sinclair attacked his wife when she finally admitted to seeing someone else.
The defendant told police when he was arrested that the killing was self-defence as Mrs Sinclair had launched a frenzied attack on him.
The prosecution alleges that the dead woman was stabbed more than 30 times and that was not lawful self-defence.
The trial continues.