Well, without having read the 'the astronaut's wife short story' in detail, one could assume that it might focus on the emotional journey of the wife. She may face loneliness while her husband is on space missions. There could also be elements of her having to handle the household all by herself, deal with the media, and maintain a sense of normalcy for her family. Maybe there are some unique challenges that come with being married to someone who has such an extraordinary and dangerous job.
Since I don't know the exact details of this short story, I can only guess. It could start by introducing the wife and her relationship with the astronaut. As the story progresses, it might show how she feels when he is away in space. Does she worry constantly? Does she have her own dreams and ambitions that are put on hold? It could also explore how their relationship changes over time, especially considering the astronaut's experiences in space and how that affects him psychologically, which in turn impacts their marriage.