I had the episode DVR'd, and accidentally skipped over the scene where she killed her sister lol. I went from the scene where they shot the burning zombies, to the scene where Tyrese and Carol talk about her future in the kitchen, and then where Carol shoots her. I assumed they figured she was fucked in the head, and needed to kill her because of that but I thought that was too drastic a measure. I get to the end of the episode and her sister is gone and buried in the ground and I'm thinking ok what the FUUUCK did I miss.
This was a good episode though. Nice change of pace from the "nwoeiwepiajewpfiajdf WE GOTTA FIND TERMINUS dfkjaofpiwdnawpdif HERP A DERP MAYBE WE CAN LIVE HERE LOL" episodes this season has consisted of