[Demeter]

Suggestions …

Your decision to write a fourth and final chapter is of significant importance.

I am not sure whether you have already started writing or not, as I would like to share a few suggestions.
I would appreciate it if, in a review of the previous three chapters, a few questions could be answered.
In this context, it is crucial to focus on Meera’s perspective, as she alone is in a position to describe, for example, the events on the train in detail, particularly the incidents involving the army officer. 
Her first experience of anal sex with Mr. Das would be another aspect, as would some similar situations that were only mentioned in passing but not described in detail.

I suggest writing the fourth chapter alternately from the "POV of Krish and Meera". This would allow the emotions, thoughts, feelings, fears and joys of both protagonists to be portrayed accurately, 
thereby enabling an emotional connection with the reader.
In my opinion, this would lend the story greater dynamism and suspense and resonate on an emotional level with the reader.

In this sense
All the best

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Demeter