Controversial Liberal MP Moira Deeming has launched an eleventh-hour court challenge against her own party ahead of a meeting to decide her fate after her unsubstantiated assault allegation against a former leader.

Deeming has lodged a legal action against the Liberal Party’s Victorian president, Brian Loughnane, which is listed to be heard in the Victorian Supreme Court on Friday morning.

The latest round of Liberal infighting comes less than five months out from the November 28 state election.

Party executives, including Loughnane, had planned to meet on Friday evening to determine Deeming’s candidacy.

It comes after the upper house MP made a police complaint against colleague Matthew Guy, alleging he assaulted her by grabbing her “violently” in a headlock at a gala dinner on May 23.

Victoria Police investigated the incident and found “there was no offence detected”.

Guy has demanded a public apology from Deeming.

“There was no ambiguity. I did not do what was alleged. The CCTV proves this. It did from the start, and Victoria Police agree,” he said.

Deeming has since claimed she misunderstood the meaning of headlock, but has refused to apologise.

She has been invited to the state executive meeting to tell her side of the story. It is not known if she will attend.

On Thursday, Opposition Leader Jess Wilson refused to answer questions about the process, but said Guy’s reputation had been harmed and she had directly asked Deeming to apologise.

“I think he deserves an apology,” she said.

“That is the right thing to do, and Moira has decided that’s not the case. And now the state executive will meet.”

Elsewhere, Pauline Hanson has declared she would not offer Deeming a spot with One Nation.

Hanson said Deeming’s refusal to apologise to Guy showed the first-term MP could not “admit that she got it wrong”.

“You don’t do that to your fellow colleagues,” she multiple media outlets on Thursday, including YouTuber Rob McKnight.

“I want a person with integrity and honesty, and I don’t see that.”

The scandal is yet another flare-up of what the public would see as disunity and disorganisation in the party, Monash University political scientist Zareh Ghazarian said.

“This is arguably the most critical point for the Liberal leadership right now to clear their internal problems,” he said.

“This has to be resolved as quickly as possible because it’s already taken up a lot of political coverage … it has hobbled the party significantly.”

In a statement earlier this week, Deeming’s lawyer Tim Houweling said her complaint was made “honestly, in good faith and only as a matter of last resort”.

He referred to CCTV footage that shows Guy sitting at a table and talking with Deeming and another man. Guy appears to place his hand on Deeming’s upper back or shoulder area and pull her in to say something before making a similar gesture with the man.

Houweling said Guy maintained a grip as Deeming tried to pull away, and this physical contact was “unexpected, unwelcome, physically painful and caused her to feel fear and confusion”.

Deeming has already successfully sued a former Liberal leader, John Pesutto, for defamation after he implied she was associated with neo-Nazis after they gatecrashed a rally at parliament she attended.

-AAP