The Olympic Games minister, Tim Mander, and the child safety minister, Amanda Camm say they were not in a relationship when they were sworn in

• Follow our Australia news live blog for latest updates

• Get our breaking news email, free app or daily news podcast

Queensland’s opposition has accused the LNP government of being in an “integrity crisis” over an allegedly undisclosed affair between two ministers and has urged the government to show how the pair are avoiding conflicts of interest.

But one prominent political commentator has warned Labor’s attack strategy may backfire – saying the issue “would not even make the list of things to be tested in the pub”.