The unthinkable has happened, the small purple dragon, Spike, had been possessed and infected by a Nightmare. He has become Nightmare Spike, who's lust and sexual energy was hard to keep up with. He only cares about getting what he wants and being in control. He already started with some stallions and they couldn't keep up with his stamina. "Nngh... this isn't enough... can't any of you bitches please me?! Fuck! What do I have to do to get some pleasure in this shithole?!" Nightmare Spike growls, his cock rock hard and still feels horny.
Twilight managed to catch up to the dark dragon and has an idea to free him of the darkness. "Oh, so you want a wild time huh?" She uses her magic to bind Nightmare Spike to Twilight's bed tearing his pants off.
"Waah! NNgh! Hhah! L-lemme go you bitch! I wanna be a top!" Nightmare Spike groans and tries to break free, but he was stuck in place, at the mercy of his caretaker and adoptive sister. "Nnhh... l-let go!"
Twilight shakes her head. "Not this time, I'm getting my baby brother back and I know how~" The alicorn strips naked casting an XL futa spell on herself infusing her body with light magic, granting herself a new cock that would be sure to do the trick.
Nightmare Spike stares at the huge cock that Twilight has. "Hah! You think you can please me and get this brat back? Try! All the others couldn't keep up!" He was highly confident this would backfire.
Twilight gets on top of him shoving her light infused cock in his mouth."Hhgh...! Mmhhf..." Nightmare Spike tastes Twilight's cock and that awful, awful light! He squirms again, trying to get away. But nothing. "Nnghh!"
The alicorn humps his mouth. "Mmmmm~ I call what we're gonna be doing the sexorcism~" she uses her magic to whip his ass. "Mmh! Mmhh..." His eyes widened and groans from the smack, his cock twitching as he was being dominated! No! This was wrong! HE does the fucking! Not the other way around! And why is his dick still hard?! "Mmgh! Nngho!"
"Mmmmm~ That hard dick is how I know my Spikey is still in there!" Twilight moans and humps faster as her balls slap his face, she then groans and blushes as the alicorn pisses in his mouth, making him drink the warm liquid.
Nightmare Spike gurgles, feeling Twilight's cock down his throat and tasting the warm piss. No... was that dragon brat still there?! No... he wouldn't submit... he wasn't some lowly bitch or cheap slut...! He... He was Nightmare Spike! "Hhhgh, ghgh..." B-but... why does it taste good?

"Mmmmmmm~ I'm close~" Twilight leaks pre and using her magic to hear the real Spike inside Nightmare Spike. "MMhhg...!" Yes! Give it to me, Twilight!~ Please!~ Nightmare Spike's eyes widened as he heard the voice. No! He doesn't want this! "NNGH! NNGH!!!" He has to get away! Not inside!
Twilight Sparke moans loudly cumming hard in his mouth, Nightmare Spike's eyes rolled back, gulping and swallowing Twilight's load, there was so much! "Ghhgghh! Hhhggh!" Oh Celestia!~ Yes! I love your yummy cum, Twilight~ Fuck, will that brat shut up! How could he enjoy this?!
She pulls out bathing his face in white and yellow liquids. "That's because the love isn't forced, it's real. Top or bottom, it doesn't matter, right Spike?" Twilight explains and smiles at the soaked dragon.
"Hhah... n-nnnnyes..." Nightmare Spike was shocked to hear the regular Spike's voice coming out of his mouth. "I-I mean no! Who cares what they want?! I wanna be dominant and fuck them! Let me go, you big dicked whore!"
 Twilight sighs and shoves her cock in his ass grabbing, his dick after she tears his shirt off, making him truly naked. "HHnngh! Hhaah! Fuuck! Too big! TOO BIG!!! SHIT!!!" Tears ran down his cheeks as he feels Twilight's cock inside of him, even making a bulge in his stomach. "T-take it out!"
Twilight humps his ass fast, ignoring Nightmare Spike as the light magic effect is even greater. "I know you love this, Spike, as much as I love you~" Twilight says and groans, feeling the light magic affecting him. "I... I l-love... nnhg... no! L-love is... hhgn... u-useless...! Iihh... ahh... wh-what's... happening to me...?" Nightmare Spike groans, feeling the magic affecting him some more and the fast pace of Twilight's thrusts.
Twilight smiles, seeing its effects. "Oh yes! Spike, its working!" She humps faster pissing inside him and spanking his ass, adding more pleasure to the possessed dragon. "Hnnhgh! Hhnh!~ Hhah... n-no... get out... I... I'm in... c-control... f-fuck..." Nightmare Spike was having trouble concentrating, why did he feel pleasure all of a sudden? This couldn't be enjoyable! But... he can't stop.
The alicorn spanks harder pounding, his ass as the magic takes full effect. "Hhah... m-more... more...!~" Nightmare Spike's scales started returning to normal, and he began to smile. "More Twili...~"Twilight giggles, seeing the Nightmare's influence is going away and pounds harder as Nightmare Spike fades away. 

Soon, Spike was back to normal, and he was moaning loudly and in so much pleasure. "Hhah... ohh, Celestia... don't stop Twilight! Keep going! I love this!~ I love you so much!~" Twilight smiles and fucks him silly, leaking pre as she undoes the binds. "I love you too, my sexy brother!~"Spike smiles, staring at Twilight with lust and love in his eyes. "Fill me! Fill me please!~" He giggles and moans in pleasure.
Twilight hugs him tight shoving, his face in her boobs as she cums and pisses at the same time. "Mmmmm!~  I'm never letting go~" She says and sighs in bliss, unleashing her cum and piss inside. Spike hugs back and moans into her breasts, feeling the combined cum and piss inside. "Mmmhp... I love you, Twili...~"
"I love you too my, baby dragon. It's good to have you back~" She says softly and kisses him deeply, Spike kisses back, all traces of the Nightmare are gone. After having a couple more rounds and recovering from the ordeal, Spike apologizes to those he took advantage of. Of course, they didn't blame him as he was under the influence of the Nightmare, it has happened twice before.
 But even still, Spike still felt bad. He promised to make it up to them as he offered them another chance with him. And there was much more moaning and happiness around Ponyville, and once that was done, he happily spent time with Twilight, loving her and being happy.
--THE END--