Why Did Abby Kill Joel in 'The Last of Us'?

If you played 'The Last of Us Part II,' then you still probably aren't over what Abby did to Joel. So why does she kill him?

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Stop writing the plot for them. Ellie never even finds out why

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Why Did Abby Kill Joel in 'The Last of Us Part 2'? Explanation and

Salt Lake crew, The Last of Us Wiki

Why Did Abby Kill Joel?

The Last of Us 2 - The Reason Why Abby Killed Joel