A man who was told his ex-partner had sex with another flew into a "jealous rage" and stabbed her and her son.
The victim admitted to Christopher Peyton it had happened after they had split but remained friends.
On Thursday, November 5, Bristol Crown Court heard Peyton went to her home in North Somerset and slashed her in the neck with a blade.
When the victim's son then intervened, Peyton grabbed a different knife and stabbed him in the abdomen. The court heard Peyton 'came close to killing him'.
The court was told others at the scene chased after Peyton and gave him a serious beating before police arrested him.
Peyton, 55, of Locking Road in Weston-super-Mare, pleaded guilty to two charges of unlawful wounding after the incident on December 7, 2018.
He was to face trial, but admitted the offences on the day of the hearing.
Judge Julian Lambert jailed him for four years.
He told Peyton: "You flew into a jealous rage with your ex.
"You slapped her, threatened to strangle her and put a knife to her throat.
"As she struggled she was slashed very badly to the hand.
"A knife injury to the neck is very frightening indeed and it elevates the seriousness of offences greatly.
"As her son came to his mother's aid you stabbed him and came close to killing him."
Kannan Siva, prosecuting, said the victim admitted having sex with another man and Peyton visited her home.
Mr Siva told the court: "It must have unleashed a jealous rage in the defendant.
"The defendant went to her home and he continually quizzed her about her sexual activity with the other man."
With that Peyton slapped her about the face and put a bread knife to her throat, drawing blood.
In the course of a struggle she sustained three wounds to her left hand, the most serious of which was a cut in the webbing between her thumb and finger.
The court heard the victim telephoned her son, and when he arrived at the scene with others Peyton used a kitchen knife stab his upper abdomen, causing an 8cm-long wound which lacerated his liver.
Mr Siva said Peyton then left, but was followed and was the victim of an attack in which he sustained significant injuries.
James Tucker, defending, conceded the victim was a vulnerable woman who sustained injury in a single incident.
He said the injury sustained by her son was not life-threatening - though there had been potential for more serious complications.
Mr Tucker said his client sustained serious facial fractures and a shattered ankle after he wounded the mum and son.
He said his client had been a user of Class A drugs before developing a problem with alcohol.
Mr Tucker said Peyton had limited breathing difficulties and has been working in an isolated area of France where he hoped to avoid the risk of Covid-19 infection.
