A Stormont committee is due to meet in secret today to discuss a report on Peter Robinson and his wife Iris.
The media and public are banned from attending the Standards and Privileges committee meeting.
It is being held behind closed doors at Stormont buildings.
The report follows a BBC Spotlight investigation four years ago by award winning reporter Daragh McIntyre.
He revealed cougar Iris Robinson’s financial and sexual relationship with 19-year-old businessman Kirk McCambley.
Standards commissioner Douglas Bain – who once headed up the NIO’s Anti-Racketeering Unit – concluded Peter Robinson did not breach the assembly code of conduct.
However, it is understood say Mrs Robinson has been found to have broken a Stormont rule.
McIntyre’s Spotlight programme of January 2010, revealed Mrs Robinson’s dealings with her teenage lover Kirk McCambley.
This included obtaining £50,000 from two property developers in order to help Mr McCambley secure a tender for south Belfast café, the Lock Keeper’s Inn.
The report was finished last November last year.
But its publication was delayed after a lawyer acting for Mrs Robinson was concerned that some material might infringe his client’s privacy and have a negative impact on her health.
Committee members were given a chance to examine the report earlier this week, but were not allowed to take copies away from the reading room.
It is understood the report has cleared Mr Robinson of any breach of the MLAs’ code of conduct.
However, it is said to have found wife Iris had broken a rule by not declaring receiving the cash from the developers and therefore risking the perception of a conflict of interests.
Mrs Robinson withdrew from public life after the scandal broke four years ago.
She declined to be interviewed by the standards commissioner Douglas Bain on health grounds.