You could potentially do it, but it's not recommended. It could cause problems if the owner finds out or if it goes against the rules of the platform where the story is hosted. Plus, it's just not a respectful thing to do to someone's content.
It's possible, but it's not ethical and might violate some terms of service.
Well, technically you can, but it's not a nice thing to do. You should always have the owner's permission. Also, some platforms have security measures that could detect such actions.