The last sentence. The word vindicated is a strong word to use and conveys a lot of emotion.
I would say gerund phrase
Answer:
I think it's an AMAZING story. You just need to fix some grammatical problems in the 2nd paragraph. Also, it would be great if you made a part two or something. (I want to know the backstory on what happened to Sasha.) Thank you for making an interesting story and for not using a overused ending. Good Luck with editing!