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"Mutation notes, entry four: approximately... fuck, I dunno... thirty hours? ... after mutation began... Ugh."

She sat up, the wood floor beneath the mattress creaking.

"Noting definite soarness of muscles, and... fuck me... everything."

"D'you have to do that now?" Kyle groaned, rolling over.

Her nostrils flared as his scent hit her. She stopped the recorder and dropped it, then pinned him down.

"Fuck," he groaned, grinning up at her. "Looks like you found something else to do."

Cia had protested, but Kyle seemed unable to ignore Xavia's new animal magnetism. Not that she hadn't had that before, but it was definitely more intense now. They had a rough but enjoyable morning, and then headed down for a breakfast of barely cooked mirelurk meat. She caught his musk again and knew what he had in mind before he did.

"Again?" he chuckled as she pressed him against the wall. "And Cia calls me the perv—mmph!"

He was muffled by her lips, but suddenly his hands grabbed her shoulders, squeezing in a tight grasp, a new dominance.

"Y'know, I've been thinking," he said, hands sliding down and grabbing her ass with an even tighter grip, making her growl. "You've been on top enough. You know what a good lil' deathclaw girl like you needs?"

"What's that?" she asked, her voice low.

"A big, strong alpha to put 'er in her place," he answered, then grabbed her hips and spun her.

The fun was interrupted suddenly when a jabbing pain shot up her back the second she hit the wall. She cried out, pushing him back.

"Whoa, what's the matter?" he said. "You can dish it out, but can't take it?"

"N-no, it's my back," she groaned. "Agh, fuck, I don't know what I did."

"Did I—?" he started to ask, but she shook her head.

"It's been bugging me for awhile now, but... ugh, I don't know, it feels like my fucking spine is splitting down the middle," she grunted.

She turned, making for the lab, and he blurted, "What in the name of..."

"What?" she asked, freezing by the doorway.

"Your back..." he said. "Your spine's all... weird."

"Weird how?" she asked, and she felt his hand on her back, running down the length of her spine. It felt odd, and she reached back as best she could to feel it herself. The bumps of her vertebrae felt much more pronounced, almost sharpened. Experimentally, she flexed, rolling her shoulders, and suddenly the splitting pain became a piercing one.

"FUCK!" she yelled, agony tearing down her back.

"What do I do, what do I do, whatdoIdo??" Kyle was blathering.

"Get a stimpak!" she shouted.

He rushed off and she was left there, hunched, her vision swimming with the pain. This was worse than the time she'd been gutshot. It was more than her back, it was her head, her hands, everything. Something stabbed her in the shoulder blade—no, that was her shoulder blade.

"Here here here!" Kyle's voice sounded distant through it all, and he was fumbling the stimpak into her hand. Her talons cut into her palm as she gripped it and thrust the tiny needle into her upper arm.

That rush came back and she let out a shuddering sigh, the pain fading in slow waves.

"Whoa..." Kyle sounded awed.

She turned to look at him and her neck felt stiff. She grimaced, lifting a hand to touch it gingerly. There were more scales, thick patches of them, and not just on her neck. They were all down her back, and encasing her bicep where she'd stuck the stimpak, the muscle now bulging.

"What?" she asked.

"Your back, it's..." he trailed off.

She reached behind herself and felt along her back. Her taloned finger caught on something and she felt around until she reached it: a long, tapered spine. One of many. She felt them all down her back, jutting from the thick scales.

"Oh, whoa," she murmured, her hand reaching her shoulder blade and feeling the huge, solid plate of scaly keratin, an organic armor.

"You h-have... horns," Kyle said.

Her eyes widened and she reached up, fingers brushing through her hair until they found it. Her hand closed around it, feeling the curved shape, bending around and back. She reached the other hand up and found its twin, followed it to the tapered tip.

She turned all the way around and something brushed against the wall—something she'd never felt before. She looked down and her eyes widened, then blinked, and blinked a few more times, her brain refusing to believe their input as reality.

She had a tail.

"I have a tail," she said.

"And horns," Kyle added, still looking up.

"Yeah," she said.

A silence seemed to settle like radioactive dust after a mushroom cloud.

"What do I look like?" she asked. "My face."

"Uh..." Kyle said.

"Here, hang on," she cut off his uncertain response, walking over to a window. The light behind her reflected back enough for her to see.

She wasn't quite all deathclaw. Not yet. Her face was still human, aside from the horns, which actually framed her buzz cut in an interesting way. The patches of scales hadn't yet covered her face, but had engulfed most of her neck.

"Might as well go all the way," she said.

"Wait, what?" Kyle asked.

"I can't just leave it like this," she said, flexing her arm and grimacing at the odd, crunchy texture of mismatched, missized scales next to skin. "Besides, it's not like I'll never use a stimpak again. Might as well get it all over with now."

"Are you sure about this?" he asked.

She grabbed three stimpaks in one clawed hand.

"Nope."

***

The second she jammed the stimpaks into her chest, the growl started. It was a low rumble from deep in her core, and it only grew the more she felt herself change. The stims couldn't pierce the scaled hide that now covered most of her arms, so she'd just shoved them into the skin that covered her chest—very dense, almost leathery, but still comparatively much softer than anywhere else on her.

All of her was changing. She felt it, inside and out. She squeezed her eyes shut as her muscles bulged painfully, and she got the idea that if she still had human skin, her muscles would've outstripped it by now. But she felt the broad patches of brown scales knit together, merging all across her body into a protective armor. She felt her new tail grow even longer, her talons extending and sharpening, her entire head changing into something that was no longer human.

When she opened her eyes, everything was different.

She looked down and saw her hands, very much living up to the name of the deathclaw. Yet the talons weren't the foot long razor spikes she'd seen on normal deathclaws, maybe only half an inch. Still intimidating and wicked sharp, but not full deathclaw.

And... she still had tits? Ever so gently, she reached her new claws up and cupped the fatty flesh of her mammaries, a feature foreign to any reptilian species. So apparently that part of her was still human. They were leathery now, and firmer, less fat and more muscle mass. All of her was more muscle mass. She rolled her shoulders, flexing the new sinewy tendons. She felt like she could lift a car. Or five.

She heard a shaky gasp and turned, catching the overpowering scent of fear. Kyle was still standing there, staring at her, mouth open wide, and his body reeked of sweat and hormones. She heard his heart pounding. But underneath it all was something else, something that made her grin and trace her much longer, more reptilian tongue across her sharpened teeth: his lust. In hindsight, licking her lips was the wrong move.

"Oh God," Kyle whimpered, "P-please, fuck, please don't eat me! X, it's me! A-are you still in there??"

She laughed.

"Relax, dude," she said. "I'm not gonna eat you."

He sighed and leaned back against the wall of the lab.

"Holy hell," he gasped. "I thought you were... Oh, mother of mirelurks."

His relieved gasping trailed into hysterical laughter, which she found contagious. It felt weird, laughing with her new body. Doing anything felt different. But not in a bad way.

After they recovered, she checked herself out. She wasn't any taller, but she was actually more relieved about that. She'd hate to be bumping into the doorways.

She found her tail was longer, powerful and thick, and there were wide plates all down her back. Down her front was the softer flesh, segmented sections interrupted by her breasts and continuing down to her inner thighs. Her shoulders and upper arms had more thick plates, the rest of her arms covered in dense, tough brown scales, a large keratin plate over her elbow with a sharp spike pointed backward. Her toe talons were sharper and more conical than her hands, the largest tipped with a curved hook-like talon, like a bird of prey or a velociraptor. Her hair was gone completely, her bush included, but although she'd miss it, this was all a very exciting and welcome improvement.

"S-so, uh..." Kyle said, and she turned to look at him, his eyes wandering her scaly form. "Is it... y'know... totally crazy that I find you hot? Deathclaws aren't supposed to be hot, right? But I mean..."

She grinned and there was a look in his eye that said if she crushed him to death, pelvis-first, it would all be worth it.

"Oh man, the folks back home are never gonna believe this," he moaned as she stepped forward.

"What were you saying about me needing an 'alpha' to—what was it?—'put me in my place'?" she smiled.