Inara galloped over the vast open grass of the Dome. Her hooves danced nimbly, forcing barely a sound on the dampened surface, recently watered by the artificial rain. Her delicate, slender form weaved across the landscape like something out of a cosy Summer dream.
Males would watch on in bitter lust. It was not often a female would grace their presence, especially one of such beauty. They wanted her, but they knew that they couldn’t have her. She was betrothed to another. That lucky male waited patiently by the lake at the center of the Dome, sheltered by an overhang and a dense circle of trees.
She arrived with a spring in her step, pulling aside the golden flora that sprouted from the trunk of the Amphit tree. Zoran smiled and trotted to her. When they met, he rubbed the back of his hand down her face.
<I thought you’d never arrive,> he said. <I thought the labs would keep you tied to your work for eternity.>
<Oh, am I late?> she replied meekly. <I didn’t mean to->
<No,> he interrupted with a laugh. <You’re not late. You’re just in time.>
Inara jumped when a series of sprinklers shot up from the grass, casting sheets of water before them. It happened every few hours in that particular spot. The water formed a cool mist of water droplets, accompanied with a slight, pleasant hiss.
Inara giggled. <I love the sprinklers. So soothing.>
Zoran rubbed a hand down her back, her thick fur running smoothly between his eager fingers. He loved the feel of her, so much so that he worried about annoying her with such curious, explorative digits. She never seemed annoyed, though. In fact, the fluttering of her eyelids came as an indication of contentedness.
<I wanted to share this moment with you,> he explained soothingly. <Nobody else will come here, and we are hidden. We have been together for some time now, and I wanted us to take the next step in the best place I knew.>
Her eyes narrowed knowingly, and she swayed her rear end instinctively. <I’ve been waiting so desperately for you to make this move. I thought you’d never do it.>
His stalk eyes picked up the subtle movements of her hindquarters, and a warm shiver rolled up his spine. His fingers clasped roughly at her fur, and he took in a deep breath. <I wanted to pick the right time and place. We have to be well hidden.>
She giggled and whipped her tail lightly against his flank. <Of course! We shouldn’t do it in public.>
<It’s more than that,> he suggested. <Inara, I am so lost in your beauty. There are things I wish to do with you that would be disavowed by our superiors. It’s… unusual, you might say. Many would find it absurd and counterproductive.>
Inara blinked up at him, curious and mightily confused. <… Is this going to scare me?>
<Perhaps.>
She flinched a little and briefly looked away, conflicted. But she, too, was in love. She knew that love meant sacrifice. And even so, he hadn’t explained his ideas yet. She smiled at him and bounced her rear end. <I’m not scared!>
He caressed her shoulders, sidling up beside her and joining their tails in a snug knot. <Nobody is to know of what happens here, my love. I want to experience new pleasures with you, and it will be our pleasure alone.>
That got her excited. It seemed so romantic, a secretive love. It was enthralling, something extraordinary.
<I don’t know why,> he continued. <It’s just… your shape is so artistic. Your fur is so magnificent, your eyes the perfect collage of greens and blues. Your curvature is masterful.> He closest hand moved down to her rear end, gently swooping over the surface of her buttock.
<You could have just said that you liked my rump,> she said, following with a giggle.
<That would come off as crude,> he replied. <But you’re right. It’s wonderful. It’s beautiful. It’s->
<Big,> she finished for him. <Just say it, Zoran. You don’t have to be poetic with me. That was charming when we first met. Now I want your true words. I want the first thoughts.>
He smiled, happy to be offered such freedom. <It’s big,> he agreed. <Plump. Supple. And I love the way it jiggles when you walk. I… I can’t remove even a single eye from it when you walk by.>
<I’m glad to entertain you,> she laughed, before stepping ahead of him, gifting a full sight of her rear end. She shook it, only slightly, but enough to cause her famous jiggle and send his hearts racing. She saw the lust flood his expression. <I’m interested to hear of your forbidden desires,> she spoke wistfully.
<Very well,> he said. <But I don’t wish to speak them. I want your reactions to be true.>
<I’m waiting,> she urged. Then, she lifted her tail high, displaying her backside fully to him. His legs shuddered, and he breathed heavily once more. 
He stepped forward and placed a hand on each of her buttocks. She swayed beneath his touch, and that movement alone was enough to push him to the verge of overdrive. He slid a set of digits down, and began to rub them against her sensitive genitalia. She hummed, her main eyes slowly shutting. He breathing increased, infused with thought-speak moans, private and sincere.
Zoran played with her until she was wet, dancing his fingers around her while the other hand held her rear end, indulging in the softness of her plump skin. He explored her erogenous zone but never entered, at least not wholly. His fingers were slickened by her wetness. He wanted to make sure that there was enough lubrication for what was to come.
He didn’t ask, and nor did he offer even a subtle indication. He moved one slick finger upward and pressed it firmly into her anus. Inara squeaked and jumped. She went slightly cross-eyed, and what were pleasant moans became distinctly uncertain.
<Zoran, what are you… oh… ooh… mmph… That’s… that’s unusual.>
Zoran did not reply. Instead, he offered small movements of his intruding finger, feeling the tightness of her anus at its base. It excited him just as much as he’d hoped it would.
Inara’s sensual swaying had abruptly stopped. She was considering the feeling, taken totally by surprise. It was a forbidden action, and was surely what he’d been referring to earlier. It felt bizarre. Unnatural. And yet, somehow, she found herself enjoying it. Her lustful sways soon came back, as did the more alluring thought-speak sounds.
<So this is what you were thinking about whenever I walked by. Whenever my rear end jiggled,> she accused lightheartedly. 
<Such a rump deserves such special treatment,> he suggested.
<It is forbidden,> she said. <Not that I would tell anybody. After all, I am sworn to secrecy.>
<Life is about taking risks. Stretching the boundaries. Stretching…>
With that, he suddenly inserted a second finger, again to Inara’s shock. She bolted and squirmed. Shrieked in his head. <Ow!> she protested. <That’s tight! Oooh….>
He pulsed his two digits within her butthole, feeling it accept him with some reluctance. But, like before, she quickly acclimatized. Her sways resumed.
<It feels good….> she commented dreamily. <Like I never thought it could. I… I never even thought about… that!>
<I am preparing you,> he replied. <Two fingers does not compare to my… girth,> he said, unable to come up with a better word.
<Ah…> The thought worried her. Two fingers already felt like too much.
<But first,> he continued. <I want to prepare you in another way. This method is probably forbidden, too, but I don’t think anybody has thought about it enough to make it so. It’s even more unusual.>
She blinked, concerned. <Uh-huh. More unusual?>
Zoran suddenly removed his fingers from her backside. Without being given suitable warning, Inara couldn’t stop herself from farting. She blushed. Zoran chuckled, but otherwise didn’t seem to be put off in any way. She carried on as if nothing had happened, trying to erase the memory as quickly as she could.
If she thought that was embarrassing, she was proven naïve very quickly. Zoran pointed to one of the sprinklers that was spreading the a mist of water droplets. <Sit in front of this sprinkler, my love. I will show you what I mean.>
Inara warily did as he requested, worried about what he had in mind. She started to get a vague idea when he started to position her very specifically, so that her rear end was hanging directly over the sprinkler nozzle. Her backside was getting soaked with the water droplets.
<I found myself highly aroused last month,> Zoran began. <I was watching you in your lab. You were filling balloons with liquid. I don’t know what it was for, but it was breathtaking for me. I watched those balloons swell up, stretch. I heard to rubber strain, watched it shudder with the pressure.>
<Don’t tell me you’re going to… Zoran?... Zoran!>
He bent forward, grabbed at the nozzle and shunted it forward. With her anus already slick, the tip of the nozzle slipped in with ease. Inara tried to jerk forward to escape the bizarre sexual play, but Zoran used his strong tail to hold her tightly in placed. She shuddered, scrambled at the ground. It was unthinkable. If it wasn’t already strictly forbidden, she would most certainly demand that it be so!
The nozzle pumped cool water directly into her rectum. Once that was full, it encroached further, heading up into the core of her lower body. Her belly between her legs began to inflate, just like the balloons she inflated in her lab.
Inara stopped scrambling. Unable to get away, she knew that she could do nothing other than accept this most uncommon punishment. Was this a genuine sexual fantasy of his?! Filling her up like a balloon? Watching as her belly expanded outwards to the sound of muffled sloshing?
<Now, now, Inara, my love,> Zoran cooed. <You won’t pop.>
<That’s reassuring,> she replied monotonously.
Her belly was pressing tightly against the damp grass beneath her. She felt the liquid swarming inside of her, finding any room it could and then gathering, compressing, forcing her more pliable body outwards. She felt tight, incredibly bloated. She clasped at the ground, grunting at the unfamiliar sensations. One stalk eye looked back to assess the damage, and she found that she looked fat. Fatter than any Andalite she’d seen before. She felt undignified. Maybe that’s what he wanted.
When she looked to be pregnant with quintuplets, Zoran seemed to conclude that she was ballooned enough. He reached down and pulled the nozzle out of her rear end. She gasped, clutched harder at the floor and breathed a sigh of relief. She genuinely thought for a moment that she might rupture.
She was more prepared for the removal this time, so she tried to control her bowels. It was no use, however. The fart was coming, whether she tried to stop it or not. It was loud, and absolutely undignified.
<Inara, please,> Zoran laughed. <Somebody might hear.>
<I can’t… help it!> she cried, farting again between words. <You’ve turned me into some kind of blimp!>
<Oh, believe me, I could have made you much, much bigger,> he asserted with a menacing tone. <Now…>
He pushed her forward, and she squeaked. Her expanded body sloshed noisily, so wholly filled up with water. It would be incredibly hard to walk.
Zoran had reached his full length, so enamored at the sight of her expansion. He quickly mounted her, squeezing his length in between her buttocks. She farted on him, though not intentionally. Or so he thought.
<I’m so bloated,> she whined pathetically, a hand testing the tautness of her gut. Regardless, she kept her tail raised and gave her backside an eager shake, feeling his length sandwiched between her cheeks.
Zoran clutched firmly at her gut, just below her hand. It forced more gas from her, and he took that as the invitation he needed to enter her. He pulled back, aimed, and shoved forward. Inara yelped and squirmed. Her eyes twitched. She could barely handle the stretching of her anus as he forced his way inside.
<Owowow! Oof! Too tight! Too tight!>
Zoran didn’t take that as a hint to stop. In fact, he pushed further in, right up to the base. Her asshole stretched firmly to accommodate him. He felt every millimeter of tightness, and he groaned in ecstasy. 
<Oh, Zoran!> she growled, half drowned in lust and half shocked by unfamiliar pain. <I should have –uhn… believed them when they said you were a little unusual!>
<Take it,> he ordered, pulling back and shoving forcefully back in with a loud squelch. Inara screamed and leaned forward, trying whatever she could to better handle the onslaught. Her hooves scraped pathetically against the grass.
Zoran dropped his full weight on top of her as he began to thrust. Her body sloshed and gurgled beneath him. His pace increased, and her swollen body jiggled with each bounce against her plump behind. Her tail wrapped around his torso, a sure indication that, despite her protests, she was feeling every bit of pleasure that he would have hoped.
<Oh, Zoran! Ungh! It’s so tight. I feel so tight! Oh stars!>
He slapped at her belly and pounded harder, bumping his hips against her raised backside. She wanted more, so he gave it. Her cries of pain became yelps of bliss. Such a new feeling, so unexpected, and yet so unbelievably good!
Zoran continued to ravage her rear end, holding her swollen body hard against the ground, until, finally, he climaxed, releasing his load deep into her ass. She groaned, pulled her upper torso back so that she could connect with his. He wrapped his arms around her chest and nuzzled her lovingly.
<You’re so full of surprises,> she whispered. <By the stars, I never imagined such pleasure could exist.>
Zoran hummed, pleased with his performance, and shifted to pull his length from her behind to a sudden, explosive unleashing of gas. Inara blushed, but she wasn’t so embarrassed as she was before.
<Remember: Not a word to anybody,> he said. <This is our little secret.>
<Then we must be just as careful next time,> she suggested.