2019 alicorn anal anus ass blurred_background breasts cutie_mark equid eyewear feathered_wings feathers feet female footwear friendship_is_magic furry gaping gaping_anus gaping_pussy group group_sex hat headgear headwear highres horn humanoid_feet infidelity lying male mammal my_little_pony nipples nude on_back open_mouth outdoors princess_celestia_(mlp) princess_luna_(mlp) pussy sex shining_armor_(mlp) siblings sister sisters straight sugarlesspaints sunglasses testicles vaginal_penetration wings