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Ai took a deep breath and pulled the skin on her leg taught between her thumb and index finger, her other hand holding the needle against the soft flesh of her outer thigh. She exhaled and drove the needle in, right through to the muscle.

A sudden knock at the door made her jump, the flexing in her muscles forcing the needle against her skin. She spat a curse under her breath.

"Hey sis, you alright?" Cal, apparently spurred on by the noise, entered before Ai could respond.

"Yah, I'm fine," she steadied the needle with her hand, "you just made me jump _right_while I was doing this."

Cal stood awkwardly in the doorway, his gaze unsubtly focused on his sister with her jeans around her ankles. He was dressed in a too-large pair of swimming trunks and a worn t-shirt. "Sorry. Mom is going into town, she wanted me to tell you to text her if you needed anything."

Ai mumbled in the negative as she pushed down the plunger and pulled the needle out, quickly pressing a gauze pad against the injection site. Her oversized hoodie was just large enough to protect her modesty, but if she cared about her brother seeing her half naked, she didn't say anything.

"Was that it?" The tigress said as she pulled away the gauze, a small spot of blood on the center. Cal was still watching from the doorway.

"What?" He said, his eyes darting around as though he had pulled himself out of a trance.

"Was that all you came up here to tell me?" She crumpled up the gauze and wrapper, throwing them in the trash. The needle went into a sharps container under her bedside table.

"Uh, yah. Sorry, never seen you do the injection before. Just surprised mom and dad let you do that."

"I'm not a baby, Cal." She pulled up her pants, leaned against the headboard and let out a sigh, her heart pounding slightly; after two years, the weekly injections still freaked her out. She wrapped her arms around her midsection, hands disappearing into the baggy sleeves of her hoodie.

"I know, it's just kinda scary." He said with a shrug.

"You can just ask me whatever it is you want to ask." She said casually, reaching a hand down to rub her leg. "I know that look you get."

"What?" Cal still hadn't moved from his spot in the doorway.

"Last year dad asked me if I got period symptoms, and a few weeks ago some kid in my woodshop class asked me how I felt about being called a dickgirl. Some people have questions--I know the look. You're my brother, I won't get mad. At least not mad like the time in 5th grade when you broke my model of the Great Pyramids that I made for history mad." She paused. "The answer is yes, by the way."

He laughed mirthlessly. "I'm not really sure how to--yes to what?"

"The period thing."

"Oh, I know. Known for years." She smirked.

Ai gave him the look only an older brother would know. "Are you serious? How?"

"I noticed it like, last year. You and mom would get weird at like, the same time every month. Pretty sure that's why dad asked. We both had a hunch."

"You two are such creeps!" She pulled a plush bear out from the pile of stuffed animals on her bed and threw it at him; he dodged it just in time for it to bounce off the doorframe. He had long since become accustomed to his sister's weaponized plush toys, of which there were many.

"Going swimming or something?" She said, motioning at as his swim trunks.

"Hot tub!" He said jovially. "Mom's gonna be gone for two hours, and you know how she gets about us using it by ourselves. I think she thinks we're still ten."

Ai scoffed and sank into the bed, limbs splayed out across the crumpled-up covers.

"You can join if you want to. Some company never hurts." Ai could tell he was picking up on her dour mood and trying to divert it in his own clumsy way.

Ai shrugged and slid off the bed. "Sure, why not. Better than you jerking off in the hot tub by yourself."

"Hey! Dad only caught me doing that once!"

"Yah. Emphasis on caught."

Cal peered up at the roiling gray clouds as he pulled the cover off the hot tub and fiddled with the switches on the side.

"You know how to work that thing?" Ai said. The question was more a tease than anything else.

"I'm not a baby!" He retorted, aping his sister's tone.

The aerators at the bottom came to life, and Cal carefully lifted a leg over the side, dipping one foot in first to check the temperature before the rest of his gangly frame followed. The tip of his tail flicked happily above the surface of the water.

Ai threw a sports drink at him. "You don't want to get dehydrated in the tub!" She said, her voice a raspy mimic of their mother.

"Don't do that, you sound too much like her. Freaks me out."

Ai tittered and extracted herself from her hoodie and bralette, throwing them on the picnic table by the hot tub. She started to pull down her panties, but the sound of Cal choking on his drink stopped her.

"Ai, you--you realize you have, like, tits now, right?" He turned his head away from her, focusing on the rolling field of wildflowers that covered most of the backyard. "They're not huge or anything, but they're there."

"I don't have a bikini." She hooked her thumbs into her panties and pulled them off in one motion.

Cal made a sound as if he stubbed his toe. "No, but you do have some old swimming trunks that might fit."

"Those make me dysphoric." She mumbled as she climbed into the hot tub. "Come on, we used to be naked around each other all the time." She settled into the tub, arms covering her chest. "Besides, this was your idea. You're not allowed to whine."

"Yah, that was back when we were kids, and you know, you weren't a girl."

Ai tittered, a slight edge of nerves to her voice. This was her first time being naked with anyone since her transition, but she was determined not to focus on it. "There's a lot to unpack in that statement, you weirdo."

"What! That's not weird! Things are just...different now." He pulled his legs up to his chest. "In a good way. Just different."

Ai slowly let her hands fall to her sides, enjoying the sight of her chest, curved, feminine, and still quite novel. "So, what did you want to ask, anyway?"

Cal leaned back, the water reaching the peachy orange fur of his chin. "It's nothing."

"No, I wanna know." She ran her hands idly through the water, watching it ripple under her fingers. "I told you, I get asked dumb stuff all the time. You're normally not an awkward asshole, so I'm curious to see what you're curious about."

Cal was silent for what seemed like a solid minute, the only indication that he had even heard her being a subtle bob of his head, which Ai recognized as sibling language for shut up and let me think.

"It's just been surreal, these past two years. Watching you." Ai saw a flicker of emotion in his face he rarely displayed outwardly. "We were both really shitty to each other a few years ago, when I was like, thirteen and you were twelve. Looking back, it was obvious you were dealing with the whole dysphoria thing, and I was upset because you weren't acting like yourself, so I started being an asshole back. I know it's a stupid thing to feel bad about, since it was six years ago, but I still do. I'm glad we both sorted our shit out."

"Understandable. Dysphoric pubescent me was awful. No one misses that Ai. In an odd twist of fate, I only figured myself out when I did because I..." she chose her words carefully, "...came across some trans porn on the internet. So, I guess I have First Puberty to thank, if you get my drift."

"Oh my god! You never told me that!"

"Yah, that's a good story." Ai was mostly happy to break the somber moment between them, and she jabbed her brother in the leg with her toe. "But that wasn't a question."

He scooted his leg away, making a face at her. "I guess the actual question is--what's been the best part for you? I mean, what are you happiest about?"

Ai sighed. "Oh, so it's not a question about my dick. Thank the gods. Do you really want to know? It's kind of TMI."

"You're naked right now. I think I'm mentally prepared at this point."

"Well, having breasts is pretty fun. No more acne, so that's great. I don't get twenty hard-ons a day, so that frees up a lot of time. Not going to go bald once I hit forty, that's good too. But number one? Orgasms. Definitely the orgasms."

Cal slumped back and rolled his eyes. "Of course you had to make it awkward."

"You asked." She said, matter-of-factly.

"Alright, alright. I asked."

Another moment of silence passed between them. "You want to know more, don't you?" Ai said.

"Yah, I kinda do." Cal mumbled, looking away from her. Ai smirked.

"It's hard to describe. They sort of...last longer. It's more all over, in waves. Dude-orgasms are short and rough, now it's like a gentle rush. It's nice. Takes longer, though. No more quick midday bedroom jerk-offs, I can tell you that."

"Yah," he looked upward, as though recalling a distant memory, "It really sucked before dad turned the basement into my bedroom, huh?"

"It did. But I have so many awkward stories I can hold over your head if I ever feel the need."

Cal momentarily dunked his head under the water, pulling his mop of wet black hair away from his face after he surfaced. "You're the worst, you know."

She took a swig of her drink. "Truly the worst. Speaking of me being the worst, I can tell you've had an erection since I stripped my clothes off."

Cal grimaced and put his hands between his legs. "I--look, you're...you're a woman."

Ai, unphased, just watched as her brother squirmed. "I was thinking I'm just non-binary at this point. Gender seems dumb. But I get your point."

"Well, thanks for not being too weird about it."

Ai's gaze focused on the ripples in the water, and she let her hands wander down to her thighs. "I'm glad you see me like that. Some days, despite everything, I don't really feel it myself."

"Come on, you don't mean that. You're totally hot."

"Some days it's hard to tell. I just look in the mirror and I can't really discern what I'm looking at. Just seems like an indecipherable blob of a tigress."

"Well, you're more attractive than most blobs, I can say that."

"If you say so." She stretched out her legs, feetpaws grazing her brother's heels. "Doesn't help that I'm single, but that's a different story."

Ai realized that the two of them had slowly drifted closer in the hot tub, to the point where Cal's foot was nearly touching her thigh. Ai, after a moment of hesitation, leaned on his side and rested her head on his shoulder. Cal, startled at first, leaned into her and let his hand fall between them, reaching it up to rest on Ai's thigh.

"Sorry, is this weird?" Cal asked, his voice higher than usual.

"If it was weird I wouldn't be letting you do it." Ai said, her voice a murmur.

"Boundaries and all that." Cal mumbled.

For a few minutes, no words passed between them, silence broken only by the subdued rumbling of the hot tub jets and the chirping of songbirds in far-off trees. Cal didn't move his hand, merely allowing his thumb to run circles along the wiry fur of her thigh. Her long hair, smelling of rosemary shampoo, tickled his lips. Ai made a sound somewhere between a purr and a sigh.

"I guess I just feel like I had something taken from me. Years and experiences I'll never get." Ai said, the sentence coming out all at once, scarcely a pause between words.

Cal lifted his head. "What?"

"All the stuff society says I should have done, regardless of gender. Falling in love. Going on dates. Going camping in the woods with the boys. Having my first period. It all came out backwards and fucked up, now I'm basically an adult and I'm trying to be a whole person even though those years, years that people usually define themselves by, never happened. I had to figure myself out the hard way, and it's all kind of blurry." Her voice quivered.

"I haven't had much luck with girls, if that makes you feel any better."

That was a very Cal response, Ai thought. Ridiculous, but well-meaning. She felt his hand travel a bit higher, to where her thigh become the soft fur of her pubic region.

"Hey Cal?"

"Hmm? Am I getting too cuddly?"

"What? No--it's nice. I was just about to say, I know you think about me as more than a sister. I think it's sweet. Although, I've been egging you on a bit, if it wasn't obvious."

He lifted his head up and looked at her, small black-and-orange ears flattened down to his head. "I--what makes you think that?"

"Seriously? If I didn't know better, I would say you weren't even trying to hide it." She paused, but Cal said nothing, and Ai could see his brow furrowing. "And if I'm right, which I know I am, you won't object to this."

She turned her head, looked him square in the eyes, and leaned forward until her lips met his. Cal didn't move, but she could feel him inhale sharply as their lips met. The kiss sent little shivers up her spine, and she had to force herself to break it. When she did, his expression as jumbled as she expected, somewhere in tumultuous seas between confusion, lust, and shock. She broke into a smile so wide her lips hurt, and Cal bit his lip to avoid doing the same.

"Was that okay?" She said.

"Yah, I, uh," he blinked rapidly, "I really liked that. How about again?"

Ai nodded, her cheeks burning up under her fur. He clumsily put his hand on her shoulder and leaned forward, and Ai closed the distance, this time with her lips open. It took a few seconds for him to accept the invitation, but she soon felt his tongue touch experimentally against her teeth. She teased her tongue against his, and then pulled away, just enough for their eyes to meet. She looked down into the water to see what state he was in.

"We can do more than kiss, you know. I'm fine with that." She said.

He blinked at her, watery eyes peeking out from his wild black hair, slicked down with water. "Seriously?"

"I told you, with the whole...coming out experience being what it was, I feel like I have a lot of time to make up for. Besides, you seem well equipped for the job." She peered down into the water again, making her gaze obvious.

"We're both terrible. Really terrible." His words were cut through with a nervous laugh. "For real though--what will mom and dad think?"

"I'm pretty sure dad has slept with his cousin at least once, judging by how the two of them kept looking at each other during the last family reunion. He's in no place to judge at least."

"You pick up on the weirdest things."

"I do." She said, trying to be casual. "Anyways. How about my room? Less old dishes everywhere."

He looked at her with big blue doe-eyes. "You're serious, aren't you?"

"Gods, you're a dork. Yes, I'm serious, if you want to. Not in the hot tub though, it's a million degrees in here."

Cal tried to climb out, but the motion was more a tumble, falling over the railing and doing a half-summersault onto his feet, his hands groping between his legs to hide his erection. "Okay, your room then."

Ai pulled herself up and reached for the towels, wrapping one around her midsection and throwing the other at her brother. He draped it over his head, drying off his hair as he ran across the patio and into the kitchen.

"Don't slip on the floor!" Ai yelled.

"You're not mom!"

"You might be calling me mommy in a bit, though." Ai muttered to herself

Ai collapsed onto the bed, her temples throbbing as her body reacclimated to the cool fall air. Her breath felt heavy in her chest and her wet fur was soaking onto her dark pink duvet, but she didn't care.

"We should probably cover up the hot tub before mom gets back." Cal said, far too casual considering the circumstances. He had fallen next to her with an unflattering grunt, his head colliding with about a half-dozen large plush animals.

"We will. We have time." She pulled the bath towel away from her fur, patting down the damp black stripes that ran in dense rivers across her stomach. Cal sat up, unashamedly examining her naked form. She was, he thought, absolutely beautiful.

"So...are we really doing this? How are we doing this?" He said, his ears standing at attention--along with some other things that Ai noticed.

Ai couldn't tell if the pounding in her chest was nerves or heat stroke; her cheeks felt warm, like she had spent an entire afternoon in the sun, and the stirring between her legs demanded her full attention. "Yah, we're doing it. It looks like your dick wants to do it, at least." She smirked.

Cal groaned, fruitlessly playing with himself. "Yah, I do, I just...don't really know where to start here."

Ai rolled her eyes and reached over to her bedside table, pulling out one of the drawers to rummage around. Cal peered over her.

"Is that a vibrator? Where did you get that?"

Ai pulled out a half-full bottle of lube. "Mom got it for me. The hormones sorta stop my dick from getting hard, so the vibe is the best way to get things done, if you get my drift." She placed the bottle of lube next to her hip and leaned back, legs casually spread across the lower half of the bed.

"So, I guess that means I'm on top--"

Cal didn't get a chance to finish the sentence, as his sister wrapped both her hands behind his head and pulled him in for a kiss. He relented and climbed atop her while their tongues met, first with a reluctant touch through Ai's barely open mouth, then she let him in, and he gave chase. The kisses were crude and aggressive, but neither seemed to care. Ai gently pulled him away and she looked into his eyes, wide and glossy. His lower lip, wet with her spit, trembled slightly.

"Yah, but you need to warm a girl up first." She said through heavy breaths. She undid the knot on his swim trunks and pulled them down, letting Cal awkwardly kick them off his legs.

Ai reached down to wrap her paws around her brother's erection, the length comfortably filling the distance between the tips of her fingers and her wrist. He thrust instinctively into her grasp, his claws digging into the fabric beside his sister's head. The two of them said nothing as Ai watched a bead of pre form at his tip; she grazed her thumb across it and rubbed the fluid down the underside of his length as more oozed down onto her forearm.

"Yah, I had a feeling you didn't jerk off this morning."

"What do you mean, you had a feeling?"

"The walls are thin, and you moan a lot." Ai said with a smug grin.

Cal bit his lower lip. "Remind me to be louder in the future."

He reached a paw down her shoulder and across her front, lowering himself for another kiss as he squeezed the modest flesh of her breasts. She pushed her chest into his grasp, egging him on. She broke away from the kiss only for a moment as her nipple found itself between the machinations of his thumb and index finger.

"Ow. Sensitive."

"Want me to stop?"

"No."

She rolled over onto her side, lifting her top leg up to her knee and tilting her hips up. "This way will probably be easiest. I think. Just from, you know. Porn."

Cal blushed profusely, his face screwed up into an eager grin as he looked at the sight in front of him. Ai grabbed the bottle of lube by her side and pumped a copious helping onto her paw before she reached down and slipped her fingers under her tail. She bit her lower lip and vocalized a little moan. Cal watched wordlessly, his paw prying apart her cheeks to get a better view.

"Here, you next." She whispered as she took her brother's straining erection in her slick paws, letting him thrust into her grasp as she covered the length of his tigerhood. "Go slow at first, I need a bit of time to warm up."

She wiped her paws on the sheets and angled herself to take him. Cal took one her paws in his, their fingers weaving together as he bared down on top of her, awkwardly trying to line himself up.

"You know you're my first, right?" he asked.

"Yah. Mine too."

He leaned down for another kiss as he guided himself in, feeling just a moment of resistance before he entered her. Ai moaned into his mouth, a hand grasping at his shoulder.

"Too much?" He said, panting like a wild dog.

"No. It's good. Please. Don't stop."

He planted a little nip on the flesh of her neck before her started to rut her proper. She let out an playful chuckle, squirming under him as their bodies writhed and moved together, whatever awkwardness they felt at their inexperience tempered by pleasure and exuberance.

"I don't think I'm going to last too long, here." Cal said, screwing up his face, his eyes unfocused.

"I don't expect you to, really." She said before she rotated herself onto her back, hooking her legs onto his thighs and pulling him down until his was hilted into her, left with nothing to do but grind helplessly.

"Go on," she said, her voice a raspy whisper, "empty yourself into your sister, sweetie."

He growled. "You're such a brat."

Ai purred and tilted her head to egg him on, a free paw idly rubbing at her straining erection. Cal, true to his word, appeared to be on the final stretch, his eyes shut, and his face twisted into a snarl as he buried his muzzle into the nape of his sister's neck. His short breaths warmed his sister's fur, and Ai pulled him close, mumbling into his ears, the words themselves too broken apart by her moans to be discernable, but Cal recognized the coos of encouragement regardless.

He stopped. "Ai--" He only managed a single syllable before he collapsed on top of her, his body shuddering, arms squeezing her so tight she felt the air forced from her lungs. Ai pressed her thighs into his sides, keeping them locked together while he emptied himself into her.

He slowly regained his composure and propped himself up onto his hands and looked down at Ai, who was giggling uncontrollably.

"I should probably do the courteous thing and make sure you, you know..." His voice trailed off as he raised an eyebrow at her.

"Oh yah," Ai bit her lip, face still twisted into an ecstatic grin, "I...guess you should." She had been so enraptured by the experience, and the sensation of her older brother wrapped around her, that she had almost forgotten her own needs entirely. "Got any ideas?"

"Oh, I've seen a few things on the internet." He mumbled coyly.

He pulled his softening erection out, the sudden motion eliciting a yelp from Ai. He started by leaning down to kiss at her breasts, lips exploring the skin around her nipples, canines grazing over the hardened nubs of flesh. Ai arched her back and put her hands on the back of his head, pushing his muzzle down onto her nipple until he began to suckle at her breast, first the left, then the right. A stray paw reached down to cup her womanhood.

After he gave her chest the attention it deserved, he moved further down, planting a trail of kisses along her stomach until he arrived at the triangle of wiry pubic fur between her legs, where he stopped just long enough to bury his nose into the jungle and take in the scent.

"You smell different. Better, but different."

Ai just mumbled in agreement as his lips brushed against the head of her erection, clear pre oozing from the tip. He kissed the underside of the shaft with moistened lips, the sensation enough to make his sister thrust upward.

"Don't seem to have much of a problem staying hard now."

"Yah, it's just...harder to keep it up."

Sure enough, the short conversation had been enough for her to soften slightly, until Cal planted another wet kiss at the base, then teased the tip of his tongue up her length. He leaned down and took the tip into his mouth, suckling on the salty, nearly tasteless pre before he took the rest of her into his muzzle. The HRT had shrunk her just a bit, but if anything, it made her easier to take into his muzzle.

Ai mewled, resisting the urge to thrust into him. The sensation was unlike anything she had managed on her own.

He started to bob his head, tucking her length away on the underside of his tongue to avoid the barbs up top. Ai's tail lashed wildly, thumping against the bed.

She was beginning to understand just why her brother had only lasted a few minutes himself. "Cal...soon..."

He merely mumbled something in the affirmative, his mouth occupied. Ai tried to squirm away and pull herself out as to last a little bit longer, but the sensation of his tongue won.

The rush of feeling across her body made the room, and everything in it except Cal, blur away. She felt his hand squeeze hers, the wetness of his muzzle on her, and the little flutters of pleasure traveling across her chest. Her paws grasped at the back of his head as he held his muzzle down, his nose buried in her fur. The fluttering came to crescendo, her body shuddering in little waves. By the time Cal pulled his head away, Ai had slowly floated back to earth, her breaths heavy and slow.

"You don't, uh, produce much do you?" Cal said, wiping his muzzle on the back of his hand.

It took Ai a little bit longer to regain the power of speech. "What? Oh, no. Just a little spurt of clear stuff. You can thank HRT for that. Makes clean-up a lot easier." Ai said, looking down at her brother as he sat up and scooted across the bed to Ai's side.

"Well, you taste better than I do." Cal said.

She cuddled up to him, resting her head on his chest while her hand idly stroked the still-wet fur of his inner thigh. He rumbled approvingly at the gesture.

"Next time you'll have to let me taste so I have something to compare." She teased.

She let her paw wander further up his thigh until she landed at his flaccid manhood, her fingers gently playing with his scrotum while her thumb ran across the side of his shaft, still slick with lube and his own product. The gesture wasn't so much sexual as affectionate, but he awakened under her touch regardless.

"No regrets?" She said, her voice barely a whisper.

He ran his paw through her flowing black hair, feeling it tangle under his clumsy fingers. "No. Not at all. You?"

"Nope." She giggled. "As good a first time as I could hope for, really."

"Maybe next time I'll last longer than a few pumps."

Ai huffed. "I don't think anyone lasts long their first time."

"Better than freaking out and pushing rope, I guess."

"You are so weird." She playfully poked at his thigh with an errant finger.

The two of them perked their ears up as a car pulled up to the driveway. Cal groaned rolled off the bed, stumbling to his feet. "Alright, we should get dressed. Mom will be up here any minute."

"The hot tub!"

"Yep. And your clothes are out there too." Cal said casually. "We're both all wet, she'll figure out what happened."

Ai cursed and scrambled out of bed. "What do we do?"

Cal shrugged as he stepped into his underwear. "Ask her if she wants to join next time?"

A small stuffed pinguin hit Cal in the back of the head.