A 16-year-old boy and his parents have been jailed for life for murdering a man whose body was discovered in his car boot.
Music shop owner Tanveer Iqbal, aged 33, was lured to his death by his mistress, Zatoon Bibi, and strangled with a rope bought hours before the killing.
Bibi and her ex-husband Gul Nawaz, together with their teenage son Kashim Nawaz, were given life sentences at Birmingham Crown Court.
They had denied the charge but were unanimously convicted after a trial lasting a month.
The court heard that Mr Iqbal had been in a relationship with Bibi while he was still married.
He ran a music store in Smethwick, near Birmingham, and was found dead in the boot of his car in Edgbaston on 1 February.
Detective Inspector Paul Joyce said: "The whole thing was thoroughly planned.
"Bibi messaged Tanveer on the Sunday afternoon to check he was still coming over - she told him she'd got cake to celebrate his birthday.
"But the reality is that she was luring him to his death because just three hours earlier her husband Gul Nawaz was in Poundland buying the murder kit ready to kill him."
Judge Mark Wall, QC, told Bibi: "What is particularly awful is that you recruited your own son to the enterprise.
"Although he could and should have resisted your efforts to involve him, he was a young man who was devoted to his family.
"This is a case in which the murder weapon - the rope - was bought for the express purpose of killing Tanveer Iqbal. It was bought hours before the killing.
"Your position is aggravated by the fact that you were the planner of the killing. You recruited other people to it and that, in my judgement, is a significantly aggravating factor in your case."
Bibi, aged 37, was jailed for a minimum of 27 years before she can be considered for parole.
Forty-four-year-old Gul Nawaz was given a minimum 25 years sentence.
Their son has been detained for a minimum of six years.
"I cannot say who played what part in the attack," the judge added: "None of you pleaded guilty - you Zatoon Bibi and Gul Nawaz blamed each other in evidence for the crime that you had executed together."
He told Gul Nawaz he did not regard him as a "prime mover" in the murder, and said their son had been "ill-served" by a manipulative mother and a weak father.
In a statement, Mr Iqbal's family said: "Tanveer was taken away from us in a way which has had a profound effect and changed our lives forever.
"We cannot comprehend how anyone could be so callous and cold-hearted.
"Tanveer was a good husband, a wonderful father, a loving son and an amazing brother who has been stolen from us."