Instructions: Given a premise, an initial context, an original ending, and a counterfactual context, the task is to generate a new story ending aligned with the counterfactual context and as close to the original ending as possible. Each instance consists of a five-sentence story. The premise is the first sentence of a story, and the second sentence, which is the initial context, provides more information about the story's context and the story's general plot. The original ending is the last three sentences of the story. Also, a counterfactual context is a slight modification to the initial context. You should write a new story ending that edits the original story ending as little as possible to regain coherence with the counterfactual context. To sum up, you should write the last three sentences of a story based on the premise(first sentence) and the counterfactual context(second sentence) of the story.
Input: Premise: Kate and her husband were expecting. 
 Initial Context: They had an appointment for a sonogram. 
 Original Ending: Both were nervous for the results. When the doctor ran the instrument over Kate, he had a surprise. He told them he heard two hearts and said they were having twins! 
 Counterfactual Context: They decided not to do a sonogram.
Output:
Both were too nervous for those results. If the doctor had run the instrument over Kate, he would have had a surprise. He would have told them he heard two hearts and said they were having twins! 