As a story evolves, things can change. Which is what I love about good writers. Most will never set their story in stone until it is done. They adapt as the story unfolds and is written, as once you officially put "pen to paper" ideas and stories are tweaked, refined, and changed to better tell their story.kaylah won't be li. simple as that.
Some details just don't work in your head like they think they will on paper/screen, new ideas crop up to better tell a side of the story.