The Cutie Mark Crusaders were certainly ecstatic when they finally got their cutie marks. Incredibly happy to move on to the next stage of their lives - becoming adults, and finding their place in the world.

If only becoming an adult didn't come with nagging issues like going through heat.

Set towards the end of Continuity Disrupted in the Alternate Beginning 'verse; this means the Crusaders are (half) sisters, sharing the same (human) sire, but no other knowledge is needed. Also adults (if barely).

An entry into the April Incest is Wincest challenge.