A council leader was reported to the procurator fiscal by police over an alleged indecency with another man, it has emerged.
Gordon Matheson, 46, leader of Glasgow City Council, confessed to cheating on his partner and apologised for the "hurt and embarrassment" caused.
Prosecutors have decided to take no action against Mr Matheson over an alleged incident in the Cathcart area of the city around two weeks before Christmas.
A spokeswoman for Strathclyde Police said: "We can confirm that two men, aged 46 and 38, were the subject of a report to the procurator fiscal in relation to an alleged indecency in the Cathcart area of Glasgow on December 12, 2012."
In a statement, Mr Matheson, a Labour councillor, said: "I have been having an affair. I have not lived up to my own standards and my loving partner deserves much better.
"I am sorry for the hurt and embarrassment this has caused and I will do all I can to make up for it."
A Crown Office spokesman said: "The procurator fiscal at Glasgow received a report in relation to the conduct of a 46-year-old man and a 38-year-old man at Linn View, Glasgow on December 12 2012.
"The matter was fully considered by independent Crown counsel who concluded that there was insufficient evidence that a crime had been committed."
