Took a decent bit of manual editing to get here.

Positive prompt

by funkybun, [|by personalami||], by waspsalad, by hioshiru, by kluclew,
detailed background, ((flat colors, black outlines)), forest,
trio,threesome, group, interspecies, from behind position,
side view,
vaginal, knot, blush, anthro, spitroast,
BREAK
(flareon:1.2), male, red eyes, breasts, all fours, kissing,
BREAK,
(vaporeon:1.1), brown eyes, female, fish tail, standing, hands on butt, purple body, shiny vaporeon,
BREAK,
(glaceon:1.1), male, oral, head grab, caressing, kissing,
<lora:FurryEeveelutionLoRA:0.5>, glaceon

Negative prompt

boring_e621_v4,
hybrid, sepia, sepia tone, orange tone, (hybrid:1.1)

Settings

Steps: 20, Sampler: Restart, CFG scale: 7.5, Seed: 3470396211, Size: 1152x768, Model hash: 821628644e, Model: EasyFluffV11.2, Lora hashes: "FurryEeveelutionLoRA: 201c05804518", Version: v1.6.0-2-g4afaaf8a