This is indeed what they have been wrestling with.
The majority of MPs did not want her. Even with almost full support of the right wing press where she was the inevitable winner with members she scraped 2nd with MPs. So we know the backbenchers don't like her or want her as PM.
It seems they are going to try to basically drive from the back seat and ensure all her policy going forward is tempered by back benches having a say. This would get them through but cause huge internal conflict over time. All of her big policy commitments would be out of the window. She could even do a BJ and start sacking MPs - she would of course go down guns blazing.
Or they just pull the plug now and think we cant go on like this we need a new leader that has a chance and maybe if we do it now 2 years is enough to go into the next GE with some order restored.
2 very bad options - if you are a tory.