No knowledge of the IDW Reflection comics is necessary to read this; it's just the framing device for a pair of parallel ponies feeling responsible for the actions of their counterparts.
Going on six years after the Reflections Incident that nearly tore apart both canon and inverted Equestria, the latter timeline is finally safe under Sombra's benevolent watch. No urgent correspondence has gone through the Mirror Portal since things re-stabilized, but it wouldn’t be much of a story if things remained that way.
This is an entry in the Snippet Series, an anthology of old oneshots I (and my good buddy Str8aura) wrote based around interesting pics I found. New ones will be posted every Thursday for the foreseeable future.