Task: Story Composition
Input (English): Premise: Sam was with his friend's wife. 
 Initial Context: They were waiting on her husband to arrive. 
 Original Ending: Sam noticed she kept being slightly flirtatious. It made him uncomfortable. He made up an excuse to leave early. 
 Counterfactual Context: His friends wife was also his sister.
Output (English): Sam noticed she was acting nervous. She told him she was cheating on her husband. He made up an excuse to leave early