Jody After the War by Edward Bryant (Orbit #10, 1972) opens with the narrator and Jody walking on a mountainside trail until they get to a picnic site overlooking Denver (one of the cities that survived a nuclear war). During this we get some backstory about the conflict, learn how the couple met, and see them discuss her PTSD and unwillingness to have children because of what she saw at one of the target cities.
Eventually, after munching through more related angst and the picnic, the narrator tells her he knows what he is letting himself in for and that he still wants marry her and move to Seattle.
A short slice-of-life/relationship fragment. Early-ish Bryant; he would do better work than this.
* (Mediocre). 2,200 words. Story link.