I completely agree with Niki. I was also going to say pathological demand avoidance as a possible explanation. I’m not sure that a social story about saying no (or about not saying no) is the right way, especially since she is only 4. I think a better approach would be trying to give alternative choices (e.g. ‘are you going to put on your coat or are you going to carry it home?’ rather than ”can you put your coat on’), so ‘no’ isn’t an option that makes sense. Visual timetable to help her understand the routine, and encourage her to tell you whats happening next according to the timetable, to help her feel more in control.