16:920153d_(artwork)analanal_penetrationanimal_genitaliaanimal_penisanthroanthrofiedballscrossgenderdigital_media_(artwork)duoequidequineequine_genitaliaequine_peniserectionfriendship_is_magicftg_crossgenderfth_crossgenderfti_crossgendergenitalsgynomorphgynomorph/hermhasbrohermhornincest_(lore)intersexintersex/intersexmammalmature_anthromature_hermmature_intersexmy_little_ponymythological_creaturemythological_equinemythologypenetrationpenisprincess_celestia_(mlp)princess_luna_(mlp)screwingwithsfmsibling_(lore)sister_(lore)sisters_(lore)source_filmmaker_(artwork)unicornvulvawidescreen