Rule 34 Dev - 2014 alicorn bite blue_hair blush cutie_mark duo ear_biting equine feathered_wings feathers female feral friendship_is_magic from_behind_position hair horn incest mammal multicolored_hair my_little_pony one_eye_closed open_mouth princess_celestia_(mlp) princess_luna_(mlp) sex sibling siblings sister sisters smallandnaughty wings yuri|2153285696