I think there’s a chance she will lose the vote.
With all of Labour, Lib Dems and SNP voting no confidence, they only need 9 conservatives to vote no confidence for a majority. I could see some of the hard brexiters sticking the knife in to get Boris or Rees-Mogg leading the party to the general election.
In reality, I doubt she will get all of Lib Dems as a few of them will vote to keep her because they know they will lose their seats in a GE. Same goes for some labour candidates in hard Brexit areas.