Read via the Worlds Seen in Passing anthology.

Two sisters can time travel, but the narrator never predicted her sister would destroy the world, and herself along with it, until it’s too late, and our narrator is forcing into an endless loop of desperately trying to change the inevitable. I don’t think I have enough time to possibly explain how much I adore Alyssa’s writing. Every story I have read by her has left me a crumpled, sobbing mess, and this was no exception, but I welcome the heartbreak every single time. Major content warnings for (challenged) transphobia in this one.