Rule 34 Dev - 2016 alicorn blush book bookshelf brother brother_and_sister crying cum cum_in_mouth cum_inside cutie_mark dialogue duo english_text equine feathered_wings feathers female fensu-san feral friendship_is_magic fur hair hi_res horn horn_ring horse incest inside library male mammal my_little_pony oral penis pony purple_feathers sex shining_armor_(mlp) sibling sister straight tears text twilight_sparkle_(mlp) vein wings|2449640368