Apple Bloom and Zecora both knew there was something wrong with the mixture. The hard pulsing cocks under their marehoods was a dead giveaway. But the blinding, almost enraging lust had already kicked in. Some 3 hours later, after Bloom didn’t return home, Applejack entered the hut to investigate. The room reeked of cum. Apple Bloom groaned she looked up at her older sister, her huge dick buried under her cum swollen belly. Behind her, Zercora rutted away with wild abandon, her own cum swollen belly jiggling as she thrust into the younger filly.
 
Applejack gasped in shock, and inhaled a deep lungful of the mixture boiling in the center of the room…