User blog comment:Rhiabloom12/Profiles/@comment-24122852-20130504184856/@comment-6192846-20130504222245

If you don't know the context, you can't question the reasoning. We know little about Envy as well as who exactly the family Kayo killed was. There are a lot of possibilities. It may even be possible that an event occurred after Kayo's murder that did shake the world and isn't related to her sin.