The affair came to the 28-year-old man’s attention in late July of this year after his mother saw a detailed account on her daughter-in-law’s Facebook page in which she admitted being unfaithful.
The mother then informed her son, who became so enraged that he drank himself into a stupor and headed over to his rival’s apartment in Malmö in southern Sweden.
When his wife’s lover refused to open the door, the alcohol-emboldened man smashed down the door and stabbed his rival 20 to 30 times with a screwdriver.
The 28-year-old then tried to push the other man through a window before fleeing the scene, leaving the screwdriver stuck in his wife’s lover’s back.
The scorned man said in court that he “was forced to get rid of the hate” and more or less confessed to the attack.
He was sentenced to one year in prison for aggravated assault, making illegal threats, and breaking and entering.
The 28-year-old was also ordered to pay 42,000 kronor ($6,000) to the victim of the assault, according to the City newspaper.