A young mother has been jailed for 11 years for stabbing her occasional boyfriend as they had sexual intercourse after texting him to say men should only be used as "human sacrifice".

Zoe Adams, 19, had dressed up as a clown and put a pillow over Kieran Bewick's head to make their encounter more exhilarating on July 29 last year, Carlisle Crown Court heard.

In what she described as an "overreaction", she whispered, "Trust me", to the then 17-year-old Bewick before stabbing him five times in the chest, arm and thigh with a 10-inch knife, collapsing his lung.

Having seized Adams' iPhone, the court heard of images she had saved on the device, which included a blood-soaked woman with the caption "Murder is like a bag of chips: you can't stop after just one".

The device also had a text message to her victim reading: "I don't think about males unless said male is strapped up and being used as a human sacrifice - you should be grateful you are not part of it."

Adams claimed she could not remember the incident, but sentencing, Judge James Adkin said her "cruel and sadistic" actions were deliberately intended to cause harm to her victim.