Rule 34 Dev - anthro anus bdsm big_tail blonde_hair blue_eyes blush bondage bound bow breasts brother cage canine chibi claws collar condom condom_wrapper cowgirl_position cum cum_in_condom doctor dog embarrassed exhibitionism female feral filled_condom floor fox furry hair happy hetero hindpaw incest inside kitsune_youkai lab leash looking_at_viewer looking_back male masturbation name_tag nametag nipples orange_fur panties pawpads paws pen penetration pink_panties presenting pussy raised_tail restraints riding science sister smile solo spines spreading squishy tail tail_condom testicles testing tongue underwear unused_condom vaginal vaginal_penetration voyeur wearing_condom wide_hips yoshi|360530