Color - Sister Advantages (Patreon)

Story by: Sophiee93

Edit by:  Leena (@MyLifeIsARPG)

According to medical studies, Eva and Zara spent most of their time in the womb conjoined together. However, a rare mutation at the end of their gestation period separated them into two separate bodies, each with two identical heads.

Like most twins, Eva and Zara spent their entire lives together, almost as if they were some kind of clones. Their personalities, tastes, and choices made them look like they had never been separated. Even as they grew, their height and weight always remained similar. Eva's red hair and Zara's blonde was the only thing that differentiated them.

Their relationship went deeper than what even their parents saw, though. The sisters saw one another as extensions of themselves, as if they had never been separated. They learned quickly that society didn't like this and so kept this aspect hidden from everyone.

Because of how they felt about each other they spent less and less time apart, even sharing showers and engaging in what they called "self love" - times when they'd touch each other and get the other off.

"Oh that feels really good," Eva said.

Zara's hands were washing the hair of Eva's heads as the water ran down their bodies. "You have nice hair. Did I ever tell you that?" Zara said with her right head.

Eva sighed. "You tell me every day, but I still think yours is way better," Eva stood up and opened her eyes, pushing her hair away from her faces. She gestured with her hands for Zara to turn around and then cupped her sister breasts with her hands.

"Although if there is something better than your hair is your boobs," said Eva.

Zara had her hands raised, unsurprised by Eva's movement. "You have the same breasts I do, why don't you play with them?"

“Because if I do that and you see me, you get horny….and we do have to finish showering, you know!” said Eva. Zara held Eva's hands, helping her to squeeze her breasts.

"Hey! I have the right to masturbate as many times as I want… ”said Zara, turning to face Eva, who immediately took one of her hands and guided it between her legs. The two mutants kissed with both heads, wrapping their arms around each other.

The shower took longer than expected for obvious reasons, but minutes later the sisters were finally out, albeit totally naked.

"I'll go choose our clothes in the bedroom," one of Zara's heads said. They other continued speaking "Can you make some drinks in the meantime?"

"Mhm," Eva just nodded and walked towards the kitchen.

"I will pick for you the lacy red panties. Ohh I always love to see you in that one!" Zara said as she sighed. Eva just watched Zara walk away with a smile and started preparing the drinks.

After a few minutes of preparation, things started to get weird. Eva began to feel her body twist and she immediately took two steps back.

"Z-Zara?!" she tried to call her sister, but there was no response. Her legs went weak, forcing her to sit on the kitchen floor. “I’m mutating?” she said to herself. It never crossed her mind that a mutation could feel so intense. Contrary to what she was feeling, she imagined that it would be quite painful.

She could feel her body heating up rapidly and her muscles feeling like they were liquefying. She looked down with her heads, watching her body change in front of her eyes. She raised her arms to see two lumps forming under them. They cracked and slurped, pushing against her skin until it ripped and a second pair of arms burst out.

Eva leaned back on all four of her hands as below her first pair of breasts a second pair began developing, growing nearly as large as her first pair. Except instead of nipples there was a mouth on either one. Even her original breasts began to tingle as her nipples throbbed a little then started to stretch, her skin splitting apart as it opened up to form mouths in place of those nipples.

Soft moans escaped both of Eva's heads. Panting for breath she brought all four hands around to feel over her four breasts, her fingers moving over the lips of each mouth. If she closed her eyes and concentrated enough she could move each mouth independently of the others.

"This is very strange..." she said to herself in a low voice "but it feels amazing!"

Once she caught her breath she tried to get herself on her feet. The moment she did though she could feel something wet between her legs. She looked down even as she reached between her legs to feel what was going on. "Oh fuck," she said when she felt a tongue lick over her fingers. Her vagina had been replaced with a mouth that had a long wet tongue hanging out of it.

"So many changes!" she said excitedly, raising her four arms and turning her hips to inspect her body from all angles. She began to move her four arms independently, trying to get used to them, until a powerful shiver ran down her spine.

"ZARA!!" she said with a bad feeling in her mind and started running towards the bedroom, opening the door in one motion with both right hands.

"AHH!" Zara screamed, scared when she saw Eva enter so abruptly. They both looked at each other from head to toe, absorbed by their changes.

Zara had mutated too, apparently at the same time as Eva and just as drastically. Above her vagina, a large penis grew, which was erect and trapped between her four generous breasts. Small penises that stood out in front of her had also replaced her nipples. Finally, from behind her hip and passing between her legs a long, thick and prehensile tail swayed from side to side seemingly out of control.

"Wow..." all four heads said in unison.

"H-How... you too?" Zara said with her left head.

"It seems so, but from what I see you had better luck," Eva pointed out gesturing towards all of Zara's penises.

There was a mischievous smile on Zara's face. "Better luck? I think our mutations made us even more compatible, don't you think?" she said pointing to her penises and then Eva's mouths. Eva looked down at her own breasts, understanding the message and slowly began to walk towards the bed.

"Oh horny again are you?" Eva teased.

Zara smiled as she climbed into bed with Eva "Don't try to pretend like you're not."