NSW Premier Gladys Berejiklian has been accused of taking an "iron fist" approach to closing the Victorian border while being loose with rules for her political colleagues.
Murray MP Helen Dalton on Tuesday night used a speech in parliament to contrast edicts governing the shutdown to those related to politicians' business interests.
She said Ms Berejiklian had not reported disgraced Wagga MP Daryl Maguire "pocketing money from a property deal".
"In six years she never reported it, this is completely unacceptable behaviour," Mrs Dalton said, noting the duo's relationship.
"This is the same Premier who refused to let pregnant women in NSW across the border for treatment in their Victoria hospitals in the seat of Murray.
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"She refused to let people in country areas travel a few kilometres to say farewell to dying relatives.
"Why? Because she's a stickler for the rules, she's enforced the border closure with an iron fist no matter how many families suffer, but when it comes to rules for herself, her party colleagues she's far more flexible."
Mrs Dalton, who wants Ms Berejiklian to resign, said the Premier knew of Mr Maguire's activities with the UWE hay company at Leeton which are subject to a corruption inquiry.
She said the Premier failed in not reporting suspected corrupt conduct involving a firm outside Mr Maguire's area.
"Leeton isn't in Daryl's electorate, it's in mine," Mrs Dalton said.
"Gladys knew that but she did nothing stop it.
"It's not Fifty Shades of Grey, it's Fifty Shades of Hay, UWE hay.
"This is the story here, it's not a love story."