May and June were two eevees born into a pack of pokémon. They were almost identical twin sisters who grew inseparable from each other. They would collect berries together, train together, and learn to hunt together. During evenings, they would often share with each other their dreams and thoughts of what the future might have in store for each of them. Among other things, they’d discuss the young males within their pack, thinking of them as of possible suitors, and what they seemed to like about them.

One day, they wandered too far from the pack’s territory and came across a mysterious cave. June was always more adventurous than May, so she decided to explore while her sister waited behind. She soon seemed to have gotten lost, and May became seriously worried.

In a few days, however, June returned changed. No longer a small eevee, she had now evolved into a sturdy flareon with stunning velvety mane and tail. As soon as May recognized her sister, she immediately rushed over towards June in tears. They embraced each other tightly and ran back home together. Their pack welcomed June back happily, but soon they couldn’t help but notice that her mannerisms had apparently changed slightly as well.

Several young males started giving June signs of attention, however she shunned them all. At the same time, she started acting more clingy towards May, sometimes more than a sister normally would. When inquired by fellow back members, she brushed it off as something they shouldn’t be concerned with.

One day, May noticed June acting even more clingy than usual. She tried to ask her what was wrong, but June just shook her head and nuzzled up against her. May had a gut feeling that something wasn’t right, so she decided to ask again when they were alone, and nobody else could overhear. June suddenly stepped forward and spoke in a lower, somewhat sultry tone:

“C’mere darling, let’s keep this our little secret…”

June then licked May’s muzzle seductively, before pulling her close and attempting to mount her from behind. May froze in shock, unable to form any coherent response. Same-sex pairings were seriously looked down upon in their pack, as well as those between siblings, for neither of those could provide it with new healthy, capable offsprings. If the pack leaders knew of her sister’s abnormal desires, she would certainly get exiled into the wild, to fend off for herself somewhere away from the pack’s territory.

The dilemma was rather hard for May. On one hand, if she gave herself into June’s advances, she would bear the same risks as her sister, which she wasn’t even nearly prepared for. On the other, she somehow felt certain that rejecting those advances would surely break her sister’s heart.

“June, I’m scared… Maybe we shouldn’t–” May stuttered, only for June to interrupt her.

“Shhh… Don’t worry darling, nobody is going to know or judge…” June whispered, nibbling at May’s ear sensually.

May whimpered in fear and confusion, unsure of whether she should push her sister off or not. However June was now gripping onto her rump firmly with her forepaws, slightly pulling her backwards and into a submissive pose.

“Now, if only you’d be a good girl and move your tail aside…” the larger female flareon whispered lustfully to her smaller eevee sister, while rubbing her warm, fluffy body up against May from behind. The nipples on the fire-type’s belly were now swollen, a sign of arousal that May couldn’t ignore.

Reluctantly, May complied and shifted her hind legs apart slightly, moving her tail to the side and exposing the way towards her private area for her ruttish sister. June purred with excitement, before bending herself and pulling her abdomen in, until her nether region was facing forward enough for her to be able to press her own vulva against May’s from behind. As soon as their privates touched, the eevee felt a sudden thrusting motion from June’s hips, as the flareon humped her needily.

May whined in both discomfort and embarrassment, feeling her sister’s warm, throbbing clitoris pushing and grinding up against her own. Meanwhile June began letting out primal growls and moans, her deviant instincts taking over as she mated with May aggressively.

As uncomfortable as May felt, she couldn’t help but notice the growing wetness down there. Whether it was due to the stimulation caused by friction or June’s fiery nature, she soon found herself getting warmer and warmer under her sister’s advances. Her breathing became heavier, and her hindquarters tensed up involuntarily.

Before she could fully realize it, May began rocking her own hips back and forth, meeting June’s thrusts halfway. Suddenly their swollen clitorises ended up mutually interlocked in each other’s clenching folds, sending a powerful wave of pleasure through both sisters’ bodies.

May let out a loud yip, followed by June roaring in ecstasy. Both females climaxed intensely, their private areas quivering and spasming against each other, exchanging their love fluids in forceful squirts through their simultaneous orgasm.

“AAH, MAAAAAYY!” June cried out, her tongue hanging out of her mouth in euphoria.

“J-June! Oh my gosh…” May gasped, overwhelmed by the unfamiliar sensation.

Even as their climax started to fade out, however, their genitals remained locked together for several more minutes, until their clits finally shrunk and their vulvas softened enough to separate. May was left panting heavily, still in disbelief of what had just happened between her and her sister.

“Oh darling, that was wonderful…” June purred, nuzzling up against her affectionately.

“I… I don’t know about this… This is wrong, June, we’re sisters!” May whimpered.

“So? Nobody needs to know anyway, dearie… Besides, it felt good, didn’t it?” June smirked teasingly, licking May’s muzzle again.

Despite her mixed feelings, May couldn’t deny the fact that their coupling did bring her immense pleasure. But she still couldn’t shake the sense of guilt and shame that lingered over her mind.

“I’ve got one more thing to ask of you,” the flareon said in a more serious tone.

May blinked nervously, wondering what June could possibly request after what they had just done.

“Please… Don’t let anyone claim you as their mate but me. Because I’ll feel so super jealous if you do…” June pleaded, nuzzling May cutely.

May didn’t expect her sister to request that their relationship would be exclusive. After all, it would be a lot harder to explain herself to her packmates if she rejected a really desirable male for no apparent reason. But seeing how passionately June acted towards her, she figured it would be best to comply, at least for the time being.

“O-Okay, I promise…” May agreed hesitantly.

“Good,” June smiled, licking May’s muzzle once more.

From that point onwards, May and June kept their strange relationship a secret from the rest of their pack. Whenever they saw a potential suitor approaching either of them, they made sure to show some annoying sibling rivalry and ward them off eventually, rendering them reluctant to deal with their apparent drama. So far, nobody suspected a thing about the real state of affairs.

Meanwhile, every so often the two sisters were leaving their pack’s territory for ‘exploration’, while in fact seeking secluded places where they could mate privately, away from any prying eyes. However, during one of their heated, salacious tribadic climaxes, May suddenly started to glow, which could only mean one thing. She was evolving. Soon, her form started growing, assuming about the same proportions as June’s, although instead of a fiery fluff on her neck and tail, some ribbon-like appendages sprung out from the glow, as her coloration shifted towards creamy shades of white, pink and pastel blue.

May evolved into a sylveon.

As far as anybody in the pack had known, an eevee would only evolve into a sylveon if she had found one true love in somebody. However, everybody also knew that May did not have a male suitor, otherwise his scent would be all over her. Which could only point to one logical conclusion.

There was no point in hiding their relationship anymore.

As soon as May realized all this, she started to panic. She feared that their pack would exile them for their perverted act of incestuous lesbianism, or worse yet, refusal of either to take their part in continuing their bloodline as nature had intended. But June reassured her that with enough persistence they would find a new pack somewhere else, where nobody would judge them for their embarrassing liaison, where they would be fully accepted for who they were.

However, unbeknownst to both sisters, their newest pack leader actually had a soft spot for unusual couples, as he himself had mated with his older daughter once. Having the final say in the pack’s decision making, he granted May and June permission to stay, provided that they wouldn’t engage in public displays of affection.

And so, the two sisters would live happily ever after, despite the occasional judgmental stares from other members of their pack. Yet, one more unfulfilled wish had lingered in the minds and hearts of two eeveelution sisters, a spark of unyielding hope which eventually drew the attention of the wish-fulfilling pokémon, Jirachi.

“We wish to conceive kids with each other,” June said, holding May lovingly with her paw.

“Yes, please grant us one last thing we’ve always been missing, Jirachi!” May added eagerly.

The legendary pokémon stared at the two sisters sympathetically.

“I see your hearts are pure of intent, and your love towards each other is genuine,” Jirachi mused, assessing the expressions of each. “Very well, I will grant your wish. Go tonight, find yourselves a secluded place and partake in the sacrament of conception, and your children shall be born from the fruits of your passionate union.”

With that, Jirachi closed its two eyes, as the larger third eye on its stomach opened wide, emanating a bright light that enveloped May and June. The sisters felt energy coursing through their bodies, causing something to change within them invisibly.

Later that night, May and June snuck out of the pack’s territory, finding themselves a nice, quiet meadow near a lake. Lying down next to each other, the two lovers snuggled and licked each other with much tenderness, growing more and more passionate with each minute. Eventually both of them got into the mood, and the flareon once again took her spot by graciously mounting the sylveon with a purr, who was now kneeling and splaying invitingly.

June made a few impatient humping movements, thrusting the tip of her spade-like slit towards May’s own folds, before the fire-type’s swollen clitoris finally ended up finding its mark. The sylveon’s entrance immediately clenched around it tightly, not letting it go, no matter how hard the flareon would try to pull off.

“Ooh, darling… Your pussy feels amazing like this,” June growled excitedly, starting to hump May hastily, pushing her hips forward repeatedly.

May moaned softly in reply, her ribbon-shaped feelers curling and uncurling uncontrollably, as her sister’s assertive and dominant movements sent waves of pleasure through her sensitive private parts. June meanwhile picked up speed gradually, growling and panting with increasing intensity, as her clit began throbbing surrounded by May’s warm, silky yet tight entrance.

Suddenly May felt her sister’s clit twitch and expand slightly, before a hot stream of some sticky liquid spurted deep inside her and hit her cervix, something which had never happened during the two females’ mating before. It seemed Jirachi was true to its word — June had just managed somehow to fertilize her sister with its supernatural help apparently.

The flareon’s climax was briefer this time, however a lot more intense and focused, enough to cause her to bare her teeth and bite the sylveon’s neck instinctively, growling possessively in a fit of raw, primal passion. May yelped softly, yet she couldn’t help but feel a sense of accomplishment washing over her, knowing that she and June had successfully conceived kids together, just like they had wished for.

Afterwards, the sisters returned home happily, ignoring the confused stares from their packmates in the following days, as they caught the signs of May’s cycle having paused, indicating pregnancy, which was something pretty much unheard of until now.

Time passed, May gave birth to four healthy kits, four tiny female eevees whom she named Julie, Agusta, Sebrina, and Octavia — which all looked identical to what she and her sister had looked like as babies, only distinguishable by the patterns of their irises. June doted over them lovingly, licking May’s face affectionately every so often, expressing gratitude for their beautiful family. No longer would the pack look down upon unusual pairings like theirs, having witnessed that true love can transcend all barriers, social and biological alike, should only it be accepted with open hearts and open minds.