Sister bonding time.
If one was to ask Yang Xiao long what she love most, the she would say her little sister Ruby.
Ruby had come in to her life during a hard time for her and her dad. Her mother Raven had just left them without a word, this had broken her father Tai Xiao´s heart and he had it hard to move forward.
But then he had meet his old teammate Summer Rose and soon after they got married and soon after Ruby was born. Yang was ten at that time soon took her duty as big sister seriously.
Du to their parent's job, Yang had to take care for Ruby when they weren't home. Neither of them protested or thought it was bad, Ruby love her older sister as much as Yang did.
However, as Yang got older something urge in the back of her head, something she had almost fought back seen Ruby was born.
Yang wasn´t born like normal girl, she was instead born with male genital both a cock and ball, and as she hit puberty her body was nearly in constant overwhelming lust. As her genital and breast grow to make a porn star jealous, so did her lust to have sex with. Sleeping with girl or jerking of to porn vids didn´t help the urge and lust just got stronger and stronger. And Ruby sweet little innocent Ruby was always there.
One day Tai and Summer where going away and wouldn´t return until the end of the week, Yang now at the age of seventeen was going to take care of her 7 year old little sister for four day.
Yang said goodbye to her parents and close and lock the door, she could hear her heart beet faster and faster as her mind got around what was just happen.
It´s okay, it's okay, you have taken care of Ruby your whole life. This is no different. Yang keep repeated in her head as she walks up the stair and towards her room.
Ruby was still sleeping, and Yang had no reason to wake her, the leas she interacts with her sister the least likely the urge would come.
Yang was reading a magazine and had lost all thought about time when her door suddenly open and a yawing Ruby stood there in her pyjama.
" Yang where´s mom and dad?"
" O-h they said there had to go on any important mission, and wont be home until the end of the weekend," Yang didn´t even look up to Ruby. She just kept her eye´s on the magazine not even trying to read it. Please leave, please leave, , please leave.
But Ruby didn´t leave instead she walk right up next to her sister and jump up next to her on the bed.
" Oh ok, I a bit hungry but still a little bit tire you don´t mind if I sleep in you lap?"
Before Yang could say anything, Ruby had already move down to sit in her.
Throb
" oh Yang did you just move?"
Yang´s mind was blank for just a second, all the years of trying to ignore her body´s urge and need where gone, Yang found it to be peaceful.
" Hey rubs you say you were hungry, I got a special treat in my pocket want to play a game and guess what it is. Get it right and a make pancake for you everyday"
Ruby´s eye lit up, "oh ok" Ruby jump of Yang´s lap and stated to move her fingers around Yang´s lap. Yang´s cock throb gently as her sister touch it.
" Uh ? I don´t know what it is, but it feels warm and kind of hard "
" Well we can change the game a little, how bought I let you taste it. But you can´t look until I tell you and you don´t bit it you suck it"
" ok" Ruby stood up close her eye´s and open her mouth "aaahhh"
Yang silently pull down her pants so that her massive 17 inch cock could spring free, precum was dripping down from her big head as it throb to full hight, a musky smell greeting her as she remember she hadn't showed yet and change boxer.
" Yang something smells funny"
"It´s just the treat Ruby, remember no pecking"
Yang stood up letting her cock just stand a few inch from Ruby´s mouth. She slowly push her cock towards Ruby´s lips, the head was far to big to go in without force. Not that she need to do it, Ruby´s lips close around the tip of her cock as soon they made contact. Ruby made a sound as she suck and lick down Yang´s precum enjoying the mysterious taste of Yang´s treat.
" Yang I still don´t know what it is, can I open my eye´s now?" Ruby ask before going back to suck Yang´s cock.
"Not yet rubs, I can give you more but it´s normally only for grown up. Think you can handle it?"
"Mmhm"
Yang lifted her hands up, resting them on either side of Ruby's head. "Just take a deep breath, and try to loosen up your jaw."
Her grip tightened, making Ruby wince, before Yang slammed her sister's face against her pelvis.
"HRRGK!"
Yang´s 17-inch massive cock was stretching Ruby's throat obscenely, an bulge visible all the way down her chest and ending just above her bellybutton. Her eyes flew open, Ruby staring in shock as Yang slowly but forcefully grinded her face against Yang's hips.
Yang sighed, deeply content for the first time in years. "That's right, Ruby. Just…hold it there for a while. I'm just showing you how much I love you is all. And I'm going to make sure you give me the loving I deserve, too."
She grinned down at Ruby, the younger girl starting to go limp as the cock filled her airways. "Just a little bit longer Ruby. Let me savour this…and then we can really begin.
Ruby look up to her older sister her eye´s had turn from lilac to red, mean will tears where coming out from her eye from having such a massive object inside her throat, she couldn't breath and every time she tries to move away Yang just keep pulling her down. Her vision stated to get darker from the lack of air coming to her lungs.
Yang slowly stated to pull Ruby back from her cock, precum mix with saliva completely covering it. Ruby stated to breath again through her nose, there wasn´t much coming in but enough to slowly fill her lungs again. She thought it was over.
But this was far from over, Yang had found a pleasure that was to great to give up now. She stop her cock just at the entrance to Ruby throat, she look down at her little sister smiling at the sight of her sister with her cock in her mouth.
She then proceed to pull Ruby back down her cock hard down to her pelvis, making her sister cried out in fear from the sudden change. Yang had been a little bit to hard as Ruby was bleeding from her nose after the impact.
Yang continued to pull Ruby up and down a long her cock slowly getting a rhythm brutal skull fucking. Her massive apple balls smacking her sister chin. Yang didn´t know for how long she did this but she could fell her climax coming.
"Her it come you little bitch open up"
Ruby didn´t understand what was happening as she got smash into her sister crotch.
Yang´s cock and ball poured pulsating hot and heavy cum directly into Ruby's stomach. Yang's body had always run hot, and her cum was just a bit warmer than most people were comfortable with, hot enough for Ruby to feel the heat radiating through her whole body as it settled in and bulge out a little in her belly.
Yang pull her cock out of Ruby´s mouth and let the little girl fall on the floor. Ruby just lay down there trying to breath normally again, but her sister´s hot cum made it just a little hard to do it.
" Hope you not tired yet sis, because we are just getting stated"
Ruby look towards her sister and her eye´s wide of what she saw. Yang´s cock was still rock hard and it was slowly growing.