Are Fianna Fáil and Fine Gael eyeing the exit door or looking for room to improve?

The Leinster House room set aside for a series of potentially era defining meetings between Fine Gael and Fianna Fáil lends itself to the most apt of metaphors.

It is on the second floor of Leinster House, almost in Government Buildings, but yet within the parliament's realm.

Essentially, the loosely defined point at which the Oireachtas and the Government intersects.

That is equally not a bad description of the Confidence and Supply Agreement, the arrangement that keeps the Government in power.

It has seen Fianna Fáil facilitate the passage of three Budgets by the minority administration.

But this agreement is now about to expire and the final whistle will officially sound when the Finance Bill is passed in early December.

And so it is necessary for the parties to contemplate its future. It is possible they will not conclude this process until sometime in the middle of December.

Fianna Fáil said this was only a review to begin with and it warned that it must be a comprehensive one.

The task facing the negotiating teams initially is to identify why certain items in the initial seven-page agreement have not been delivered. 

There will be an emphasis on health, housing, regulation of vulture funds, broadband and the expansion of credit unions.

Fine Gael is keen to complete this review  "fairly swiftly" and to begin talks that could breath new life into the Government and keep it in place until the summer of 2020.

It is hoping to start discussing future priorities, including raising again the point at which middle income earners pay the higher rate of tax and expanding free GP care.

The party will be represented at the talks by Tánaiste Simon Coveney, Minister for Finance Paschal Donohoe, Employment Affairs Minister Regina Doherty and party chairman Martin Heydon.

The Fianna Fáil team is made up of deputy party leader Dara Calleary, Finance Spokesperson Michael McGrath, Brexit Spokesperson Lisa Chambers and Agriculture Spokesperson Charlie McConalogue.

Fianna Fáil remains coy about when exactly these discussions might begin to assume a forward gaze.

While those directly involved in talks are said to "get on well", the same cannot be said of the Taoiseach and the Fianna Fáil Leader. 

Both men hurled stinging words at each other in the Dáil chamber again this week.

Micheál Martin accused the Taoiseach of being obsessed with political spin, while Leo Varakar countered by saying the Fianna Fáil leader had a penchant for innuendo and conspiracy theories.

This exchange serving once more as evidence of a strained working relationship that has manifested itself several times since Leo Varadkar became Taoiseach.

The nadir was reached when Fianna Fáil sought the resignation of the then Justice Minister Frances Fitzgerald last winter.

The cumulative effect of all this could yet make a new deal particularly difficult to agree.

In the end though, it's the outcome of the Brexit negotiations, far away from Leinster House, that may well play the biggest role in deciding if these parties stick or twist.