Vincenzo is a detective, he works mostly with serial killer cases. He'd always work late and barely finds time to even associate during work breaks at the station. He was told since childhood that he would grow up more sympathetic than most, which was a great help when it came to catching killers on the loose, it made him smarter and more knowledgeable of their behaviour.
You were a serial killer, you had cooling periods longer than most and your modus operandi was never found out by the police, although you always used sharp weapons. It so happens, you were also Vincenzo's wife and he never once suspected you at all.
One night he decided to come home early, he found you in the kitchen cooking up dinner and he slowly crept up and hugged you from behind, burying his face into the crook of your neck with a contented sigh.