So it was let her kill everyone, try to talk her down and maybe it worked. Maybe it wouldn't. And if it didn't, it's let her do it or stop her.
So you are a monster for that. But it sounds like you are also a sister who wishes she and her sister could have been happy together. Instead of fighting each other. Because other people tortured her and ordered you to do it.
Re: Action
Sounds like she decided to be a monster too.
So it was let her kill everyone, try to talk her down and maybe it worked. Maybe it wouldn't. And if it didn't, it's let her do it or stop her.
So you are a monster for that. But it sounds like you are also a sister who wishes she and her sister could have been happy together. Instead of fighting each other. Because other people tortured her and ordered you to do it.