My story has suddenly taken a very dark turn. (Maybe it's all the goth crafting.) I keep trying to steer it back, but that seems to be the way it wants to go.
It's like taking your dog out for a walk and then finding yourself being tugged along behind because he wants to chase squirrels.
Pretty soon someone is going to come along and make the joke, "Hey, are you writing that story or is it writing you?"
We'll both laugh as if it was a charming and original thing to say. And then I'll flip the idiot off behind his back. And then my arm will be practically yanked out of its socket as the story races off in pursuit of another plot twist.