A “pointless and silly” argument at a Seal home at bedtime led to a terrifying double stabbing, a court heard.

Paul Gevaux had complained he was having trouble hearing a DVD he was watching in bed because of his partner Jacqueline Constable listening to music on headphones.

The row escalated and Gevaux, 53, ended up knifing both Miss Constable and one of her teenage sons, causing serious injuries.

Gevaux was jailed for nine-and-a-half years after a judge told him: “What you did that night was spectacularly dangerous.”

Judge Julian Smith added that the wounds to Miss Constable, 40, and son Ritchie King could have been far more serious than they were.

Gevaux was due to stand trial on Monday but he admitted wounding Miss Constable with intent to cause grievous bodily harm and unlawfully wounding the teenager.

Maidstone Crown Court heard the couple had been in an on-off relationship for three years.

They separated in 2013 but “heavy drinker” Gevaux moved back into the house in Wilmar Way on Boxing Day that year.

Prosecutor Giles Morrison said Miss Constable returned home on September 14 last year and found that Gevaux was drunk. She had banned him from drinking in the house and told him to leave.

“She was concerned about the mixture of excessive drinking and his employment at the time, which was driving a bus ferrying children around,” said Mr Morrison.

“He laughed at her. He told her he loved it when it was like this.”

The next day Miss Constable went home after work and cooked dinner. Gevaux took his meal to the bedroom and Miss Constable followed.

He turned up the volume to the DVD he was watching as she listened to music on her mobile phone. She again told him to go.

Gevaux told her “Don’t sleep tonight” - a threat the judge described as “chilling in the context of what followed”.

He picked up a pint glass and threw it, hitting Miss Constable on the arm. She hurled an ashtray at him. She tossed some of his clothes out of the window.

She was about to throw out more when he grabbed her arm and pushed her onto the bed. Ritchie, then 16, and his older brother came into the room.

Gevaux went downstairs. He returned and asked Miss Constable: “Are you scared?” When she said she wasn’t he replied: “Well, you should be.”

He then stabbed her in the right arm with a kitchen knife. He turned on Ritchie and thrust the blade into his left shoulder, armpit and elbow.

Gevaux continued to wave the knife around downstairs. Miss Constable tried to appease him by saying it was her fault. She suggested going upstairs to talk.

But she managed to grab Ritchie and flee to a neighbour’s house.

Judge Smith was told the family had since moved. He made a restraining order banning Gevaux from contacting Miss Constable and her two sons.