Set to be in none of the events that happened in the show.

Rarity and Applejack have been together for six months, but just as they neared their seven month relationship anniversary, Applejack cheats on Rarity by giving some mare Rarity doesn't even know a kiss. The other mare was burning up, which meant she didn't see the moment coming. The mare wasn't doing anything wrong. For some reason, Rarity wants to befriends the mare and decides to do it to. Maybe things aren't always written in stone.