In my opinion, Authors create characters and situations, however the characters are the ones to decide their choices, the authors just record their choices and see them develop, based on the personality that they gave the characters when they began, so in a story a character just doesn't instantly get paired up with someone if they already are close to another, it depends on what they do, and the story goes with the flow based on what you know of how the characters act. So if there is is too much of OOC that doesn't get sorted out then the fabric of the story's space and time gets warped, and it doesn't seem to be a world that they are actually living in, because they fabric of reality was changed or twisted too much that they aren't even close to who they should be in their soul.
