The short story 'Not Our First Mistake' may explore the idea of how people handle repeated failures. It could start by introducing the characters and their past mistakes briefly. Then, as the story unfolds, we see how they react to the current mistake. Are they resigned to it? Do they try to fix it? It might also look at how their relationships with others are affected by this cycle of mistakes, whether it's causing rifts or bringing them closer together in the face of shared problems.
In 'Not Our First Mistake', the title itself gives a sense of recurrence. It could be that the characters have made mistakes in the past and this new one is just another in a long line. This might lead to themes of self - reflection, regret, or the inability to learn from past experiences. For example, if it's a story about a group of friends, they might keep getting into trouble in the same way over and over again.
The short story 'Not Our First Mistake' might be about a series of errors or misfortunes. It could center around characters who have a history of making mistakes and are now facing the consequences of yet another one. Maybe it shows their growth or lack thereof as they deal with this new situation.