It's no joke.
With much graft and heft, Team May has been slowly trying to get the good ship BINO to port. Despite all the leaks and a frankly underpowered engine, it has been heading for home.
As Nick Drew wrote yesterday, May has a battle plan, a really crap one, but a plan nonetheless. Corbyn's team are now trying to pretend he is pro-EU, a remarkably stupid proposal even by their own low standards. The ERG Tories are split because they must choose between loyalty and rebellion and that is not an easy decision for backbench Tories to make.
However, we have the DUP. The DUP are more of May's kind of enemy. Determined, Pig-headed and perhaps even a bit ignorant. The remain media will point out they don't speak for Norn' Ireland, but they do care. They have never sort to. They speak for themselves and their model is the SNP in Scotland.
What the DUP currently want is the same treatment for NI as the rest of the UK, something Southern Ireland and the EU long ago identified as the insoluble puzzle of Brexit - to their advantage.
Now, rational people might think the DUP would understand a bit of this and decide that, given they want Brexit, a bit of compromise would be a price worth pay.
COMPROMISE however, as we long know, is not something the DUP are given over too - just ask the gays!
Cutting off your nose to spite your face is a heroic action in their slightly warped world, standing firm against everybody is also to be respected - right or wrong does not come into it.
Thus perhaps it will come to pass that Team May is felled not by her own backbenchers but by the DUP -ending the confidence and supply arrangement could cause a General Election which I do think would see Labour as the largest party and the end of even BINO brexit.