Task: Story Composition
Input (English): Premise: Ken and Bella were friends who occasionally slept together. 
 Initial Context: One day Bella called Ken and said she was pregnant. 
 Original Ending: Ken was stunned! But after careful thought, he decided to step up. He called Bella and told her he'd gladly be a father to the baby. 
 Counterfactual Context: One day Ken called Bella and said she was pregnant.
Output (English): Bella was stunned! But after careful thought, he decided to step up. He called Bella back and told her he'd gladly be a father to the baby.