The ending I would have liked...

Hailey: Do it. I will clean everything up, destroy the pictures. She will never know.
Jeff: What about you? What are you gonna do after this?
Hailey: That's doesn't matter.
Jeff: Matters to me. What I did... What did they do to you?
Hailey: I obviously survived.
Jeff: For what? If you don't stop, you will end up raped, tortured and dead or in jail. I jump, you never get a life.
Hailey: I will never get a life! Jump! Janelle is coming!
Jeff: That's what's going to hurt the most.
Hailey (angry): You will not survive in jail! You will get raped every night! You will kill yourself there and everyone will know why.
Jeff: But until I do, you must stop.
Hailey (furious): You will not endure it and it will be worse...!

Janelle knocks on the door.

Hailey: You're still on time.
Jeff: Yes. I am.

Last scenes: a cell closing on Jeff, wearing a prison uniform.

A police officer looking sternly at Hailey, and she entering a hospital or counseling center.

For some reason, I have always thought that the greatest ending would be for Jeff to not only acknowledge what he had done, but also atone for it by surviving. Telling the cops about Hailey, but just not enough. As long as he is in alive, she cannot go on killing without getting caught. But surviving in an American jail after such a crime is basically hell. That would be the greatest atonement, and it would totally take the way-too-smart Hailey absolutely off-guard. Plus, it would forcefully put a stop on her vigilante practices and force her to get much needed therapy.

Or not. In any case, I liked the movie overall, but found the end too rushed and maybe too black and white. I think the dychotomy between Jeff being a rapist and murderer, but a likable one, and a repentant one; and Hailey being a warrior for justice, but an unlikable, unrepentant and sadistic one, could have been exploited even more.