Reignited Relationship

You and your big sister were always close. You had to be, with how little your parents were in your life. They didn't leave you or anything, but their careers were clearly more important and that left big sis and little bro to fend for themselves in the local mcmansion. Your big sister was wonderful. Things weren't perfect, you fought like any siblings would. But she was still always there when you really needed it, and as you got older you were there for her too. It seemed like it would be that way until the end of time, but... she Ignited.

Some silly little online argument got her so worked up that she exploded into a pillar of flesh and flame and suddenly collapsed back in on herself, now covered in fur the color of Unity and Flame the color of Selfishness. You'd never tell her, cause it would be weird, but she was always beautiful. Now? Downright pornographic. You're ashamed to admit that your first few masturbatory fantasies were about her and her new body, and all the things she could do with it. She did her best to pretend she didn't notice, but you know now how intense hellhound senses are.

But things settled back to a semblance of normality, aside from dealing with being visibly inhuman in a world that the two of you used to complain was too boring because there were only humans in it. This was until your 21st birthday, the last one you'd have at home. You were heading off to college! To go be a big grown up adult and spend time away from your big sis for the first time ever. She promised she'd send you off with a bang, and... you don't remember a lot of the day, frankly. You were so full of alcohol that you barely functioned.

But you'll never forget the end of the night. You fell to the floor in a stupor, laughing. You muttered that you were gonna miss her a lot, and something in her... broke, you think. In a flash of motion she was straddling you, ripping your clothes off with feral eyes. She was so strong and you were too intoxicated to even fully understand what was going on until her pussy was wrapping around your cock and she was making your hip bones crack under the force of her riding you. The clap of her ass cheeks made the windows wobble.

Her breasts were suffocating you, filling you up with her scent. You came and came and came. You came until your balls broke and the only thing coming out of you was blood, and then fire as you passed out. You woke up the next day and... you'd Ignited, too. Fur the color of dependance and Flame the color of Escape. You were still a man, though much like your sister you were much more pornographically built. Muscles that made women involuntarily swoon, a bulge that made them drool despite themselves. Beautiful massive wolf man.

You realized what your sister had done to you, and... well. Flame of Escape, you know? You hit the ground running, and bided your time until college began by fucking rich women so hard they forgot you didn't already live with them anyway, and then fucked them until they forgot you ever did as soon as you could move into your dorm. And now... here you are, in the Inhuman Support Group on campus, looking at a group of other demonic and otherwise supernatural 20 somethings. The dragon girl next to you raises a claw. "What did you mean only humans?"

"Oh! Right, uh... well it used to be. Hellhounds are really good at manipulating reality, so I... changed that last weekend. You were all probably human until I made the supernatural real so I wouldn't feel so alone. Sorry." A murmur passes through the room and the dragon huffs. "Prove it." She says. You sigh and claw the air apart, reaching through it to grasp the chains keeping her in reality, and rearrange the links. She'd always been sensitive about never growing much in the way of tits, and now they were simply huge and sensitive. You also made her into one of your new campus fuckbuddies, and also made it so any time she tasted cum she lost over half of her intelligence and became a total moron that could only think with her drooling pussy and throbbing nipples. She stares at you as two realities worth of memory collide.

"Oh. Wow." She murmurs as she sits back, cradling her chest for the first and the thousandth time all at once. You give one more tug and she had sucked you off before the meeting began, so now she was just sitting there slack jawed and giggling like a fool. "Uh... so, yeah. That's my story." You continue, adjusting your newly empty balls. "I guess the worst thing is... I regret running. I was scared and confused and... assaulted, but as time has passed I... get it, now. If I saw her again I would pounce her and never stop." Everyone short of the dumbfuck dragon gives you words of comfort and the talking stick is passed to someone else, and you admittedly tune them out as your new dragon fucktoy realizes there's no cum between her tits and starts using you to fix it.

You reach your dorm later in the day and freeze at the door. A familiar scent is in the air... you throw it open and find your big sister there, furiously fisting herself with her entire head buried in your dirty laundry. She squirts as soon as you enter the room and she gets a more direct whiff of your scent. She pulls her head out and the two of you just stare at each other for awhile. She eventually talks first. "I'm... I'm sorry, little bro. I shouldn't have done that to you, but... I couldn't help myself! Instincts too strong..." she whines.

A thousand things swirl through your mind. An eternity of different ways this conversation can play out. You grunt as you realize your balls are nowhere near empty anymore and you're leaking so much precum on the carpet that it'll never be clean again. You just sigh. You slap your cock against your big sister's face, knot pulsing with your heart beat. She starts drooling even more than the dragon that's struggling to remember her name somewhere right now. "Yeah... yeah, they are. Open up, sis." And then you plunge into her throat.

Her neck bulges, then her stomach inflates with your first rope of cum and keeps going as your orgasm refuses to abate. You forget what time is as you fuck your big sister in every position possible, and invent a few new ones. The two of you lay in a puddle of cum. "... I love you, big sis. I guess I won't have to miss you after all." You tiredly mumble, wrapping a muscular arm around her distended waist and gripping her cartoonishly gravid belly. "I love you too, little bro... we're gonna be together forever." She responds.

She's right.