Liberal MPs have held urgent talks over policy demands from the Nationals that hold the key to the two long-time partners reuniting in opposition.

Liberal leader Sussan Ley and her Nationals counterpart David Littleproud held crisis talks on Thursday after the latter pulled his party out of a decades-long political marriage days earlier.

Both parties agreed to delay the unveiling of their shadow cabinet as hopes of a reunion emerged.

Neither side was happy that dirty laundry over the shock split was being aired through the media, with both parties disputing accusations over the breakup.

As the stand-off cooled, there was some love in war, with Liberal deputy leader Ted O'Brien telling Nationals senator Bridget McKenzie, "I still love you" when the pair were asked about the relationship spat on Nine's Today Show.

On Thursday, Ms Ley convened a virtual party room meeting to discuss the Nationals' policy demands, which are central to any reunion. Another meeting will be held next week.

The Nationals want an ironclad commitment to nuclear energy, divestiture powers against supermarkets, phone connectivity, and a regional investment fund, which was taken to the last election.

Ms Ley had said she couldn't agree to any demands when they were first put to her because the party needed to discuss all policies after its massive election defeat on May 3.

But the Nationals said they didn't want to wait months until after a post-mortem to re-commit to the coalition.

With AAP.