What if she's not really the God of that world? I mean, if that world was really based off of her novel, then wouldn't it be natural that she should have absolute knowledge of that world? What if she just had a glimpse of that world that made her write that novel? Or she had a past life there? Or some kinda shenanigan that made her aware of the story on that world?
But hey, this is just me thinking of the what ifs
THE TENSION OMG IM SCARED FOR THEM. BOTH WHAT IF HE GET ANGRY IF FL REVEALED SHE'S THE GOD OF THAT NOVEL