Final answer:
Without specific context from a story or literary work, the reasons why Sophie never cooked for her father after her mother died can only be speculated upon. It might be due to a shift in family dynamics or coping with grief.
Step-by-step explanation:
The question implies a scenario regarding family dynamics and responsibilities after the death of a parent. Given the lack of explicit information about Sophie, her father, and the circumstances surrounding her mother's death, any answer would be speculative without additional context from the text provided. However, it can be generally understood that when a family member passes away, the dynamics within a household can shift significantly. Responsibilities may fall on different members, or they might be neglected as the family copes with grief. In some narratives, characters may find it challenging to take on roles previously filled by the person they lost due to emotional distress or a lack of experience.