When a scorned wife in Birmingham discovered her husband was having an affair with her best friend, she decided a 2,500-pound ad was the perfect way to embarrass him.
Addressed to her love-cheat husband "Mark" and her best friend "Shelley", the message read: "You are the most despicable, deceitful people I have ever met.
"I know what you did and I'm disgusted.
"I've changed the locks Mark, burnt your clothes and emptied OUR joint account - to pay for this poster.
"You deserve each other."
Within hours of the billboard appearing in Birmingham city centre on Friday, the 37-year-old woman, identified only as 'Jane' and mother-of-two, was inundated with messages of support, according to the Daily Mail newspaper.
The woman also posted messages in Myspace.com website. The message reads: "If you are reading this, I guess you are wondering what this is all about."
"Is it a joke or is it some kind of cryptic advertisement or something? I'm sad to say it's not."
"It's none of the above. It's just my way of getting my own back at the B*stard who I have devoted most of my adult life to, only to find out he is a piece of lying cheating scum!"
The woman goes on to detail how her husband made her feel like a "little paranoid woman" after she confronted him with her suspicions raised by his "new clothes, new habits, trips away."
When Jane confided in her best friend, known only as Michelle - Shelley was the pet name the woman's husband gave her - the mistress offered her words of "advice" and "help".