A jealous woman told her ex’s new partner they were still enjoying “unbelievably fantastic” sex in an affair before murdering her love rival with “demonic savagery” a court heard.
Spurned Sarah Williams, 35, sent the “spiteful” letter to former Wesham businesswoman Sadie Hartley, 60, after her ex Ian Johnston, 57, began a new relationship with the older woman.
But after the letter failed to break up the couple, “obsessed” Williams attacked businesswoman Ms Hartley with “demonic savagery”, Preston Crown Court heard.
Williams paralysed her victim with a stun gun before stabbing her 40 times in an “orgy of violence” on the doorstep of her £500,000 home in Helmshore.
Mother-of-two Ms Hartley a “decent, hard-working” communications director, was found dead in a pool of blood in the hallway of her house the day after the attack on January 14 this year.
Mrs Hartley’s firm, Hartley Taylor Equine Ltd, which has been dissolved, was based at the Old Barn Mill Farm, Fleetwood Road, Wesham.
Ski travel firm employee Williams recruited her friend Katrina Walsh, 56, a horse riding instructor, to help with her “murderous mission” the jury heard.
Both deny murder.