Following the discovery of her spouse's affair, Fluttershy decides to stick around for years even after the divorce. With no way to vent, no way to properly deal with the stress, and no sanity or confidence to separate oneself from a relationship that clearly doesn't make one happy, you'll see how it can lead to drastic actions with drastic consequences.

How long does sanity have to slowly trickle away for Fluttershy to let herself become nothing but cruel and spiteful? How much does she take before she becomes exactly what we all will deem as "evil"?