Independent Wagga MP Joe McGirr hasn't revealed if he will support the state's premier in a motion of no confidence as pressure mounts on Gladys Berejiklian to resign from the NSW Parliament.
The state opposition has called for Ms Berejiklian's head after the stunning revelation she had a personal relationship with former Member for Wagga Daryl Maguire.
The revelation was aired during the Independent Commission Against Corruption inquiry into Mr Maguire yesterday morning.
By mid-afternoon, NSW Labor leader Jodi McKay demanded Ms Berejiklian resign, saying she had maintained her relationship with "a disgraced member of this Parliament" even after his ICAC-prompted 2018 resignation and had been privy to his "dodgy dealing".
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"It shows a recklessness from the leader of this state. It show poor judgement from the leader of this state," she said.
"She has no choice but to resign ... she cannot possibly stay the premier of this state.
"We need a leader who is honest, who has the interests of the citizens of NSW at heart - not the interests of disgraced MPs like Daryl Maguire.
Ms McKay flagged she would move a motion of no confidence in the premier today in Parliament. "If you thought you knew Gladys Berejiklian, then think again," she said.
Doctor McGirr, who became the Member for Wagga after a byelection triggered by Mr Maguire's 2018 resignation from the Parliament, was tight-lipped when asked how he would vote in the motion of no confidence.
"I note this matter is before the Independent Commission Against Corruption and we need to respect that process," Dr McGirr said.
"Clearly, I'll be watching with interest the testimony that comes later in the week."
Ms Berejiklian said her relationship with Mr Maguire, which spanned several years, was a mistake.
She insisted she had not been accused of any wrongdoing, saying there was a "huge" distinction between her public and private life, and admitting she had not even told her family or closest friends about it.