Task: Story Composition
Input (English): Premise: Sally had just moved in with her boyfriend. 
 Initial Context: They decided to invite their friends over for dinner. 
 Original Ending: Then, she thought to prank them. When they were there, she pretended that she was pregnant. They all freaked out until she revealed the truth. 
 Counterfactual Context: She just had her tubes tied.
Output (English): Then, she thought to prank her friends. When they were there, she pretended that she was pregnant. They all freaked out until she revealed the truth.