Rob Oakeshott is a veteran of political attacks from his arch rivals the Nationals, but the independent federal MP was clearly unprepared for being berated on Twitter by the wife of the Deputy Premier, Andrew Stoner.
Cathy Stoner lashed out at Mr Oakeshott a day after he voted with the government to prevent Parliament from removing the Speaker, Peter Slipper.
The motion, which failed by one vote, was put by the federal Opposition Leader, Tony Abbott, after offensive text messages by Mr Slipper about female genitalia were made public during a sexual harassment case being brought against him by a former staffer, James Ashby.
''You have abused the trust of all who supported you + your constituents,'' Mrs Stoner tweeted to Mr Oakeshott.
''You were put there for a reason. God will not be mocked'.''
Mr Oakeshott responded:
"@oakeyMP @CathyStoner This is a surprise tweet,and very unexpected.Trolls maybe, but partners of Deputy Premiers??You accuse me of mocking God???''
Mrs Stoner shot back: ''Wife. Not partner''.
In a later tweet, Mr Oakeshott questioned whether Mrs Stoner's Twitter account was genuine.
Yesterday, Mr Stoner confirmed it was and defended his wife's actions.
''My wife is an individual entitled to her own opinion,'' Mr Stoner told the Herald.
''Like a lot of people in Mr Oakeshott's electorate, she obviously feels betrayed by him and his support of the federal Labor/Green government and its disastrous policies, including the carbon tax.''
Mrs Stoner's account has since been deleted.
Mr Stoner and Mr Oakeshott have a long history as political rivals. Mr Stoner's state seat of Oxley shadows Mr Oakeshott's federal electorate of Lyne.
Early in his political career, Mr Stoner was beaten for preselection for the neighbouring state seat of Port Macquarie by Mr Oakeshott, then a member of the Nationals.
Mr Oakeshott became the state MP in 1996, but quit the Nationals to become an independent in 2002 before moving to Lyne in 2008.
Mr Stoner has said he felt ''personally betrayed'' by Mr Oakeshott but has forgiven him.
However, last year Mr Stoner was being urged by senior Nationals to consider running against Mr Oakeshott in Lyne at next year's federal election.
The proposal, which Mr Stoner eventually rejected, was viewed as a bid to prevent the Queensland senator Barnaby Joyce, who is seeking to move to the lower house, from taking the Nationals leadership.
Mr Oakeshott is widely expected to struggle to hold Lyne following his decision to support the Prime Minister, Julia Gillard, to form government in 2010.
Mr Oakeshott could not be contacted for comment.