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*Warning: * This story contains scenes of explicit sexual activity. If you are underage, do not read. I take no responsibility for the viewing of this content.

Legal: This story is my own property and may not be used without my written permission. Any similarities to people, places, or situations real or fictional is entirely coincidence.

---

Together in Separation

On a bright Thursday morning, two children were born in the outskirts of Sayan City. They were a pair of beautiful feline kittens, both of which were covered in fine white fur. They seemed identical except that one was a girl and one was a boy. For several days, everything went perfectly. They were healthy and happy.

Until the blood tests came in. The girl, which they had named Carol, was showing signs of unusual levels of testosterone. The boy, named Carl, had higher levels of estrogen. Other signs strangely pointed to the same thing: The boy was a girl and the girl was a boy.

A medical mystery to be sure. How did a baby with male genitals have all other physical characteristics of a girl? And the same for the girl? The answer came as a sheer surprise to the doctors on a seemingly random test that none had thought would work. The one with male genitals had two sets of DNA, one in his genital regions that was male, and one for the rest of his body that was female.

More tests confirmed, he, or she, had managed to develop her, or his, penis. It was condition they called Diastic Chimerism. As the doctor explained to their parents, some time during the early stages of development, the mother had actually formed two implanted eggs, one male and one female. During early development, they had temporarily fused and traded some cells before splitting again. The result was a boy with a vagina and womb and a girl with a penis.

The news drank it up like water. It was the first recorded case of Diastic Chimerism to not result in death for the children. The parents did their best to keep them safe, but the one group they couldn't keep away were the doctors. Reconstructive surgery was far too expensive for the parents to afford. The children would have to be raised as they were.

Over the years, the siblings repeatedly showed up for check-ups. But their development seemed to progress regularly for their major sex. As such, they had their names changed. Even though Carl had a vagina and uterus, he was male in every other way. And Carol formed breasts like a proper female.

As you could imagine, growing up for the two was remarkably difficult. They tried to fit in with their genders. As his classmates developed, Carl tried to join them. They would often go to the furthest reaches of the playground where teachers never ventured. There, all the boys would compare their personal packages, even having masturbation orgies occasionally. But every time, Carl would drop his pants and reveal his feminine folds to the laughs and mocks of his friends.

Caroline could never join in the talks of girls having their first menstrual cycles. They'd have young fantasies of having children, but the ordeal had given her the ever-present knowledge that she could never have her own children.

As the children approached the age of ten, the doctors realized that the children's sexual organs were mostly functional, but did not have their most important functions of actually creating sperm or eggs. The levels of hormones in their bodies were not enough for either sibling. So, while they would eventually be able to engage in sexual activities, natural families would be beyond their reach.

It was under these circumstances that Carl and Carol began to develop a deeper bond for each other. It wasn't simply the fact they had each other's body parts, it was the fact that they shared in the same turmoil. On more then one occasion, Carol would run home crying and refuse to talk to anyone in the house. Carl was the only one who would manage to comfort her.

As high school came, both Carol and Carl became interested in looking for romance. But once again, their conditions always caused problems. Carl wanted to find a lovely lady, but whenever she would ask if he wanted to have sex, he couldn't. He refused to open himself like that to anyone, because he understood what would happen if he did. He never even used the showers after gym to contain his secret although a few pockets of the school knew.

Carol wasn't so lucky. Her attraction to boys led her to a date with a jock. The moment he felt her up, everything crashed. He left, she cried, and the story was told through the entire school in a matter of days. Teachers tried all they could and failed to quell the spreading rumors and stories of "dick girl." Crying almost became a daily occurrence for Carol.

For a long time, both of them wondered if they would ever find someone.

---

Carl was home alone on a Saturday when the door smashed open and the sound of whimpering reached his ear. He turned just in time to see Carol rush through the doorway and run upstairs. She was crying.

He set the television remote down on the table and walked over to the stairs. Just as he started to climb, he heard the door slam. A soft sigh escaped his lips. Another one... He went to her door and knocked. "Carol, it's me. Open up."

"Go away, Carl!"

"No, I'm not going away," he said back, calmly but firmly. "You know you can talk to me."

"Just leave me alone."

He sighed. Always so protective. Luckily, he knew where their parents hid the key. He found it and slipped it into the door, opening it.

She was lying facedown on her bed. He shut the door behind him and leaned against it. "Who was it this time?"

The whimpering continued for a few seconds and then calmed for her to whisper, "Chelsea."

Carl nodded. That wasn't surprising, considering Chelsea was one of the most popular girls. If females could be related to jocks, she would be the star quarterback.

He shook his head. "Oh, come on, Carol. You know they have no idea what they're talking about."

She turned over suddenly. "Look at me, Carl!" she said angrily with a wave down her front. "I'm a freak!" She fell back into the pillow.

His paw slipped onto her shoulder and started to rub lightly. "Well, if you are, then I'm not seeing it. To me, you look like a beautiful woman."

"Oh, what do you know?" Her voice was muffled by the pillow.

"Well, I know we're the same. And as far as I can tell, I'm not a freak, so you must not be either."

Carol turned back over slowly and leaned back against the wall. "If anything, that means you're a freak too."

"Ok, so I'm a freak," he said with a little shrug. "But at least I'm happy with it." He smiled.

"How can you be happy with it?"

He shrugged. "I just don't let them get to me. I... consider it something special rather then a curse. I get to enjoy something that no other guy has." A soft chuckle fell from his throat. "And you've got something that few girls get to enjoy."

Her head turned away. "How can I enjoy it if no one will sleep with me?"

"Well, there's always..." He paused when he saw the genuine curiosity in her eyes. "You mean you've never even tried masturbating?"

"No!" she answered with a little gasp. "I thought I wasn't supposed to."

Carl smiled, which then transformed into a laugh. "No wonder you haven't learned to like it yet. You should try it. It will definitely make you feel better."

She seemed to cringe a little. "I don't know... I don't think it would feel right being alone."

And she wouldn't change with talking, he thought. A thought passed through his mind that he instantly tried to throw away. It was wrong. But... why not? It's not like she could get him pregnant, right? And who better to match a girl with a cock then a boy with a pussy?

He let out another chuckle. "Alright. Then do it with me."

Her head snapped so fast her fur almost whipped his face. Her face gaped open. "What?! We can't do that! You're my brother!"

"That's why it works," he said back, but keeping his voice soft and tender. "You want a boy, but no boys will take you. I'm a boy."

"That's my brother."

"And I've got just the right package that you need."

"Except that you're my brother."

He stopped and sighed. "Yes. I'm your brother. And as your brother, I can't stand seeing you like this." She didn't respond. If anything, she seemed to loosen up a bit to it. "If you ever feel uncomfortable, we'll stop."

It took a few seconds, but her firmness finally melted. "Promise?"

"Promise." He took his paw and rubbed her cheek. "And I promise it will be immensely fun." She seemed to give just a bit, so he took over. Instead of just going at it himself, he took her hand in his and slowly guided it down to her dress. He made her press her palm into the spot where he knew her limp cock would be in her panties.

She gave a light mewl of embarrassment, face completely red. It was clear that this was quite a bit outside of her comfort zone, but he was being rather nice about it. Whether it was the rubbing or her thoughts she couldn't tell, but she felt the limp of flesh begin to throb lightly and press outwards into the fabric that held it prisoner.

At that, Carl pulled away. "Ok. Now pull of your underwear. It's only going to get in the way." He took a step away from her bed and started to undo his pants. Carol's face turned beat red as she realized what she was doing and reflexively turned her head. "Oh... um... Sorry. Ok. You first, then. I can wait." He stopped with his boxers and T-shirt still covering him.

The blush didn't phase one bit. If anything, it grew stronger as she looked down at her dress. Slowly, as if she were in a daze, her thumbs hooked under her panty lining and she pulled both them and her skirt down to her knees. A semi-hard shaft appeared from amidst the dark fabric. Unlike her white fur, the penis was s deep pink, lined with tiny barbs all around it.

Carl took up the role of the encouraging partner. "Now that's a fine piece if I ever did see one."

His smile was so genuine that Carol couldn't help but smiling back through her blush. But this was something that she didn't do too often even if she knew what she was supposed to do. Her hand slowly wrapped around it and she began to stroke it.

The touch seemed to pull at some inner desire deep in her being. She could feel her orbs, which hugged tightly to her crotch just below her shaft, seemed to radiate with a sinful pleasure with each soft brush of her hand. The barbs pulled at her flesh and even that felt strange and oddly good.

Her eyes watched her actions with some slight wonder and her tail started to dart behind her lightly. How had she not tried this before? She gripped a bit tighter and picked up her stroking.

Carl gave a light smile and chuckle as he saw that she seemed to be enjoying it. "Well, looks like my work here is done." He leaned over to pick up his jeans. "If you'll excuse me, I'll leave you be to rub it out. I'll be in my room doing likewise."

She even surprised herself with the first words out of her mouth. "Wait..." He stopped at the door and turned to look over his shoulder, ears perked up curiously. She blushed again and gave a smile. "Could you... stay?"

He gave a smile and dropped his jeans. "Only if you let me join."

She shuffled on the bed to make room for him and he threw down his boxers. To her surprise, she was suddenly given the view of a clean and shaved slit. His fur was trimmed in nice lines to accent his feminine package. It was as if he knew this was happening, but when she asked about it he just laughed and gave a shrug. "Well, you never know, right?"

He took a seat opposite her on the bed and spread his legs. While she went to stroking herself, he took a few fingers and dipped them inside of himself. For a few quiet minutes, they watched each other and played with themselves. Carol started to reach her peak rather quickly given that this was a first for her.

She was suddenly pulled from her impending climax when Carl reached forward and pulled her hand away. She looked at him with a slightly curious longing in her eye. "Wh... what was that for?" she asked with a slightly heavy breath.

His lips just curled into a smile. "Just going to help you out. This is technically mine, after all." He released her wrist and took her place stroking it. Her head fell back as the pleasure resumed, this time slightly different from feeling his hand. He was good, squeezing in was that she hadn't considered and rubbing her wonderfully. Her brother...

As if a trigger, that thought sent a spiraling drive through her body. She gave a soft cry as her shaft suddenly jerked and the barbs went tight. White fluid shot up from her tip to stain her blouse. The next few blasts went to her groin and dribbled over Carl's hand to make his continuing strokes smooth and wet.

The boy smiled as he watched his sister ride through her first orgasm. It felt strangely good. When it was done, he pulled away and returned to his spot. He didn't say a word, just putting his now cum-soaked fingers back into his snatch.

Carol panted and mewed for a few more seconds before looking over at him. "That... That was amazing..."

"Told you it would be fun," he said back with a wink. "Just don't try going again for a few hours. You'll get really sore if you too hard too fast."

She watched him for a bit before leaning forward and crawling towards him. Some of the cum that was on her belly dipped and started to dribble to the bed, but she didn't care. She could change the sheets and have them washed before their mom could smell it. He watched her without stopping as she reached a hand down to join his at his snatch.

One of her fingers pressed in to join the two of his. It was a nice stretch, but he liked it. She gave her head a light shake. "You know, you seem really good at this."

He gave another smile and looked down at her. "Well... I may be a bit more experienced them mom and dad know."

Carol's eyes lit up and she gasped. "You mean..."

"Well, there are a couple groups of guys that like me for my assets. I actually have a boyfriend if you can believe it." He paused to look away for a few seconds before turning back when he felt her hand fall away.

She was looking up at him longingly. "Carl... Can we..."

His hand came away and reached to cup hers. "Carol... I love you." He leaned down and gave her a soft kiss.

She leaned up into the kiss, giving his lips a light lick before sliding into his mouth for something a little more passionate. It was almost like she'd imagined, a strong man there to take her breath away.

And then he wasn't there. His lips came away from hers and he cupped her cheek to make sure she was looking at him. "I love you far too much to take something so special from you."

Her eyebrows furrowed lightly. "I... I don't understand..."

"I know how you feel. But one day you'll meet a guy or girl that will love you for you. All of you. And when that day comes, you'll need something special to give them." He lowered her head to give her forehead a kiss. "But they won't see anything to love if you don't love yourself."

She didn't like his words right then, but they made sense. Considering it now, sleeping with him might be going too far. "We are siblings, right?"

He smiled. "Right. If you ever need me to help you blow off some steam, I'll always be willing to give a helping hand, but save the special act for the right person."

Carol shifted a bit and lounged down over the bed against his side. Almost idly, her hand slid down between Carl's legs and went back to digging at his slit. He was so nice at helping her; she should only return the favor, right?

Carl smiled down and reclined a bit, letting her go and just enjoying it silently.

---

Carol did eventually find that special, a female dog that saw her true potential as a person. She and Carl continued growing together and with their respective partners until they shared a dual wedding, the two women and the two men. Given the circumstances, local laws regarding homosexual marriages were ignored.

Aside from a special place in medical textbooks, the brother and sister slowly faded from the minds of the public but not from each other. Carol especially. Every time she would see herself, she would remember the one who shared her pain and helped to bring her out of it.