FURVERT!

abs all_fours alphys anthro anus aquatic aroused athletic blue_body blue_nipples blush breasts butt crouching_reverse_cowgirl dildo dragon duo ear_fins emanata eyes_closed eyewear female female/female fin fish genitals glasses hair head_spikes heart_symbol humanoid humanoid_on_anthro lizard looking_at_another looking_at_partner lying motion_lines mythological_creature mythological_scalie mythology nipples non-mammal_breasts noseless nude on_back penetration pink_background ponytail rectangular_glasses red_hair reptile sadmishutka_(artist)scales scalie sex sex_toy sharp_teeth shy simple_background slightly_chubby smile spikes spikes_(anatomy)strapon strapon_sex tail teeth thick_tail tongue tongue_out toying_partner undertale undertale_(series)undyne vaginal vaginal_penetration vulva yellow_body yellow_scales yellow_sclera yellow_teeth