With the story I didn't mean to but I'm sort of working through the 7 Stages of Grief in almost the right order. In Part 1 we saw Catherine dealing with Step 1 (Shock/Denial) & Step 3 (Anger/Bargaining). Part 2 had some of Step 2 (Pain/Guilt) with a bit more of Step 3 & Step 4 (Depression/Reflection/Loneliness). There is some of Step 6 (Reconstruction) happening through the story. It's just a reconstruction without her.
Part 3 will most likely be about Step 7 (Acceptance). I haven't done anything regarding Step 5 (The Upward Turn) but I might. I do have an idea for a happy ending.