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The equations worked out; all Callie had to do was trust that Roxy hadn't missed anything. Truthfully, she did trust Roxy — more than anyone she'd ever met. But she couldn't stop the shivers. It was the cold, that's all, just a response to the failure of mylar space blankets to generate heat for a cold-blooded creature. Nothing more than what a living thing should feel from the inside of a sterile white tube floating in C-space. Too much time to think, too much to think about it, and no sky to put a lid on things.
Besides, humans usually mean that they're ending relationships when they say they need a little space. Not Roxy.
Speaking of, their voice crackled over a comms unit embedded in the wall of the tiny space capsule. “Roxy to Callie, are u ready to go full whore-o-boros, bby?”
Callie held her skeletal cheeks in an imitation of human blushing. Why did they have to call Callie’s snake form something so vulgar? But still, everything was in order, all lights green, no alerts popping up.
“Ready!” she announced
“Awesome! Hit the button on the airlock; the computer-eye thingy is ready to initialize.”
Over the years, Roxy had gained a definite rasp to their voice as testosterone lowered it. They reminded Callie of a world-weary mechanic or diner waitress from the 20th-century sitcoms and police procedurals the two had taken to watching in the evenings together. Callie would never have expected that traits of aging would be endearing to her, but everything about love had been a surprise to her so far.
The airlock hissed decompression. Tiny servos turned cameras to track key details of her face and body. She kneeled, paused for a moment. Took a deep breath.
With clicking and whirring, the door to the capsule opened, and Callie lept out into the void’s embrace.
The shift started before she cleared the airlock, higher-dimensional aspects of her body unfolding into third-dimensional mass and volume. She pushed away from the capsule with her back claws.
Crackling energy and radioactive greens and pinks arced around her body as she shifted from humanoid to serpentine form, exploding to the length of a city block in a moment and continuing to grow. But the crackle grew louder. Something confined her body, compressed it — but not back into its non-breeding form.
“Yr looking great, bby!” the comm in Callie’s ear crackled. “Unfolding process is like a third of the way through, and you’re less than a kilometer long!”
Callie couldn’t speak; her body was still shifting in shape, size, and geometry. Less than a kilometer was good so far, but Roxy’s Exponential Shrinking Array had to reduce Callie’s total breeding size by eleven degrees of magnitude; a kilometer was too long by three degrees of magnitude, maybe two if Roxy felt ambitious. Regardless, Callie wanted to love Roxy the way anyone else could, and that meant finding a way to emerge into her serpent form without sporting hemipenes so big they have their own gravity well.
Callie twisted in the air as her proportions continued to shift. Her head whipped around; she couldn’t see the capsule, couldn’t see Earth C — was she too big? Too small? Everything was a whirl out here. She felt faint…
“Aaaaand there’s my beautiful girlfriend!”
Callie’s head swam, but she followed Roxy’s voice back to her senses. They were in a big, open room — the cargo compartment they’d released the space capsule from just a while ago, now empty. Though, something was off about it. The proportions were wrong…
“Did we do it?” she asked.
“You fukcin bet we did! Bet you’re still feeling a little dizzy.”
Well, not that dizzy, but it would be fine if Callie could put a hand on the ground to… Oh. Callie no longer had her arms equipped. She didn’t have legs, either. In fact, she didn’t have limbs at all. Which - oh! Oh, it had worked! She was in her snake form! And Roxy was still visible!
“How… how big am I right now?”
Roxy tapped on the plain surface of the compartment wall, and a hologram hovered over it, showing a video of the whole process. Callie had started spinning around her own axis at some point — that made sense — and Roxy had caught her on the front of the shuttle they were now in. She watched a huge robotic arm move her shifting form towards the cargo bay door and pass her in as she coalesced into a steady form. Two numbers popped up — 1.5e11 → 4.9e0.
Five meters. Calliope was five meters long in this form. It was big — her body was as thick as Roxy’s torso in places — but it was so much smaller than she ever would have imagined this form being.
“Wow…” she whispered.
Roxy wolf-whistled.
“Yeah, babe, you’re a knockout rihgt now!”
“Thank y-” Callie’s mouth went stupid partway through her words. While she’d been distracted, Roxy had pulled their slick little space jumpsuit off and tucked it away somewhere. They stood there naked, appreciating Callie’s form thoroughly.
Not appreciating — drinking her in like a fucking milkshake. They rested a hand on her scales, and her body sung.
“Seriously… wow,” Roxy said, reverant. “You’re so brave for me.”
Callie quivered like pudding; cold blood rushed to foreign territory on her body, and a need she’d barely felt before now surged through a form that was meant to feel it. Roxy’s voice felt so nice.
“Y-you’re sure about this still?”
“Babe. Callie. Calimari. Callieeeeee… You remember how many times I went back and forth about my bod?”
“Uh-huh?”
“You were with me through the top part…” Roxy gestured; the scars on their chest were unmissable — but so was the gentle swell of the petite breasts she’d decided to re-grow afterwards.
“And the bottom, too…”
Roxy’s lower stomach bore stretch marks and loose skin that would never again lay flat after carrying Harry Anderson to term; there was no part of them Callie more loved to kiss. Below, an uncircumcised penis jutted out above the wine-dark lips of their vagina.
“And you know how many times I didn’t kno what parts I really wanted down there, or if I wanted detachable tits or like a plug-in strap thing? You remember how many times I tried to simulate stuff before I was happy?”
“Uh-huh?”
“I’m already positive that yuo are my fucking gorgeous girl, and yor mega mini snake form is super fucking hot.”
If snakes could blush, Callie would’ve been glowing green at the moment. Roxy kissed her scales and rubbed her breasts against them. Her body, this shrunken-giant form, felt… good.
A pair of ridged hemipenes slipped out of Callie’s cloaca, not quite a foot long but stiffening still. Roxy wasted no time; she cooed over them like a pair of hairless, ridged kittens, stroking and kissing their heads. To Callie, though, each kiss was a stroke of pleasure; she mewled and writhed her still-considerable mass about the cabin.
“Whoa, girl, easy!” Roxy laughed, thumbing the undersides of her hemipenes like they didn’t actually want to make it easy for her. Ah, humans and their contradictions — what fun they were.
Callie tried to say that she was having a lovely time, but speaking wasn’t an option with brand-new sensations from brand-new parts flooding her altered brain. Everything felt fresh and fleshly; her snake cocks sent sensations her bony base form wasn’t wired to experience. These parts should have been light-minutes from her head, all pleasure delayed until the immediate violence of wrestling cherub-heads concluded. This presence of sex, this sensation was impossible — but, then, who but Roxy could steal the non-existence from something so wonderful?
The joy seemed to coalesce in a warmth in Callie’s cloaca. Or, Callie thought it was joy, for a moment.
She was wrong. And then, instinct took hold. Her tail wrapped around Roxy’s ankle and swept them off their feet and into Callie’s coiling embrace. Roxy scream-laughed, planting giddy kisses on Callie’s belly as they left the ground.
“I C someone’s having a good time, my beautiful sexy skull-snake sweetie <3”
Callie’s serpentine gaze smoldered, despite the absence of eyelids. She flicked a long, bifurcated tongue out and licked at Roxy’s lips.
“S-something is building up…”
As best as Callie’s vocal apparatus allowed, she whined.
“Oh!” Roxy gasped. “Oh ur close, bby, is that it?”
Close was definitely the word, yes.
“I kno u wanted to go slow, but is that not…”
“I’m not going to last.”
“I love how honest u are with me,” Roxy said. “C’mon, let’s put those good-girl snake hemi-dicks in me, huh?”
Oh, fuck, the kind words. They shot right to Callie’s cloaca. Everything tingled, and she was so big and thick, but Roxy said it was fine, and… Yeah. Yeah, fuck it, trust Roxy. Trust Roxy. Trust them and fucking go for it. Callie’s lizard-brain moved Roxy in her coils until one of her hemipenes felt something warm and wet. And it felt so right…
“Oh, w-wow, Callie… that’s really… That’s one. Let me help you with the back door, just a…”
Her other hemipene pressed against something soft and tight. It yielded to pressure — Callie began to slide in, first that hole, then both.
Oh.
Oh, wow .
The warmth enveloped Callie’s twin dicks. Roxy’s face contorted in… pain? Pleasure? Both? Callie couldn’t tell; Roxy gave a thumbs up before Callie could ask. They knew — because of course they knew. They were beyond anything Callie could have dreamed of having. They were Roxy.
Callie coiled tighter around them, sliding both of her dicks as deep as they’d go. Roxy’s mouth hung open in a silent shriek of pleasure, curled up at the edges. Their entire body went stiff and twitched; their dick flung threads of clear cum onto Callie’s scales.
“Hhhhohhh, good!!!” they whined. “Good fffffucking girl!”
At that moment, Callie’s composure shattered. She whined and wrapped and thrust up into Roxy’s hips. Oh, they were so good to her, so fucking kind and wonderful to her, and now, now they felt just so fucking good! All those feelings boiled and spun in Callie’s too-big, too-small, too-sensitive, too-much body.
“Rrrrrrrrroooaoaaaaahahhhhhh!!!!!”
Pure animal bliss ripped through Callie’s body as she came, hemipenes jumping and pulling at Roxy’s hips as they pumped cherub-cum into their body.
“Ahhh, g-good girl…” Roxy whimpered. “Such a good girl…”
Callie whined once more, then went limp. Her body was meant to exert itself like this on the scale of planets, so it was a planetary exertion at any scale. She panted on the floor of the shuttle.
Roxy unmounted Callie’s twin cocks, eventually, and thick cum ran down their thighs, flashing between secondary colors every fraction of a second. They held themself up by the compartment wall and surveyed their fucked-out, 5-meter lover and the mess before them.
“I kinda wondered how your cum would look,” Roxy mused. “U want some water, bby?”
Callie nodded her whole big snake head. Roxy giggled.
“How tf are yuo so cute right now?”
Callie pulled her coils up in the best approximation of a shrug she could muster. She could have asked Roxy the same thing. But there would be plenty of time for that later. For now, Callie coiled herself up into the coziest shape she could think of, and she rested.