Sooo

I'm also wondering how she could just abandon her life in the real world

Plus if she lived xx days in the novel world and just one day pass in the real world...

How would she age? Would she die in the novel world and come back to life in the real world? Would all records of her in the real world vanish? What does she feel knowing the novel world is not real? Or would she live in the novel world and die there just like that???

SO MANY QUESTIONS UNANSWERED! （/TДT)/

Further questions I'd also like to add is would she even grow old?
Would she be considered missing?
How would the novel survive on its own without its very own author? Its basically letting it write its own story.
What would happen to their kids?
Would the story not really collapse anymore?
Would it be considered as a new world?
Besides the world tree might still be there(╯°Д °)╯╧╧
Ugh so many questions unanswered!!

Basically since the story is not yet finish yes they can do whatever they want now they wont be able to cause any error unlike the other completed novel that she wrote

Your questions are literally answered in the last chapter

I know they were answered I just really don't get it and there's still some things that I feel that something could/is go wrong, after all it is a supposed novel also exactly it isn't finished yet and that could become an error in the future, even plotholes could be created again, it would basically be a world without a "god" that really could govern around their world. I mean if authors are the creator imagine if they died and become nonexistent what do you think would happen to their world?
I'm not trying to wrong anything or anyone it's just that I like to think about possibilities that could happen afterヾ(❀╹◡╹)ﾉ~

Then it's the end for them. Just like how you would expect that one day, the world will come to an end (=・ω・=)