Greens senator Lidia Thorpe’s undisclosed relationship with a former bikie boss will head to a parliamentary probe as she denies any wrongdoing.

Senator Thorpe failed to disclose a relationship with Dean Martin, the ex-president of the Rebels outlaw motorcycle gang, while she was sitting on a parliamentary law enforcement committee.

Senator Thorpe wrote to Senate President Sue Lines on Monday saying she was happy for a privileges committee investigation to take place.

The privileges committee investigates whether parliamentarians have complied with disclosure requirements.

A defiant Senator Thorpe told the Senate she was “not going anywhere”, but acknowledged she had made a mistake.

“I strongly reject any suggestion I would do anything other than comply with the committee’s requirements and I note no one has offered any evidence to the contrary,” she said.

“However, I accept that I should have disclosed this … to my leader and the joint committee.”

There is no suggestion Senator Thorpe passed on any confidential information. Nor does Mr Martin have any criminal convictions.

Senator Thorpe resigned from the Greens’ leadership team after the revelations emerged last week.

Her letter to the president didn’t automatically spark an inquiry.

President Lines told the Senate on Tuesday the referral met the threshold for it to be referred.

She told the Senate it was important senators not interfere with the free exercise of committees or sit on the committee if there is a conflict of interest.

The Senate voted to refer Senator Thorpe to the privileges committee.

-AAP

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