Oktay Kilic- described as a 'jealous and controlling husband' in court, reportedly grew suspicious of his wife's outings after their marriage grew 'bitter following years of emotional and physical abuse'.
The 40-year-old is said to have placed a mobile phone in Mrs Kilic's car boot, and followed her to a spot near the New Inn in Ripley, North Yorkshire, with their two young children on August 3rd last year.
Jurors heard how Kilic confronted the couple in front of the children, shouting at his wife's lover 44-year-old Mr Berney:
'What the f**k are you doing with my wife'.
He is then said to have slashed open Mark Berney's throat and stabbed him in the heart, in front of his terrified family.
Kilic then dropped his children off at their grandparents' house, before later handed himself into police.
Kilic denies murder. The trial continues.