The prospect of direct rule would complicate Theresa May's shaky confidence-and-supply coalition deal with Foster.
Many fear a return to British direct rule would further destabilize a delicate balance between nationalists and unionists who, until past year, had run the province since 2007 under the terms of the 1998 accord that mostly ended decades of sectarian conflict that killed more than 3,600 people.
Mrs Foster has insisted it is now incumbent on Westminster to begin direct rule in the continued absence of a devolved administration.
The Northern Ireland parties are at loggerheads - mainly over Sinn Fein's demands for new legislation to promote the Irish language - and the Belfast Telegraph says Downing Street will have to take "decisive action" next week when Parliament returns from recess.
Ireland's foreign minister said that as co-guarantors of the 1998 peace deal, both governments have an obligation to uphold the letter and spirit of that agreement and that Dublin must "reflect in the coming days on how best to do that".
Celebrities Who Suffer With Chronic Diseases
Now if that isn’t the epitome of what a BFF is, I don’t know what is! Selena continues to be on chronic medication. There is also a huge list of celebrities past like famous painter vincent Van Gogh who suffered with this disease.