Power fuck!

18 was on her hands and knees as 17 knelt behind her, his cock pounding away in her tight pussy for all he was worth. 18 had wanted a fuck like she never had before and 17 was determined to give it to her. 18 was in paradise as her brothers cock slammed away inside of her, she hated to admit it but he was a fantastic fuck. 17's cock fit in her perfectly, its length and thickness filled her completely and he sure knew how to use it. The way he pulled back until just the head was in her pussy then slammed it all the way back in or the way he would hold it in and just move around in circles, stirring all of her juices, all these techniques and more filled her body with pleasure. 18 pushed her hips back to meet 17's thrusts with thrusts of her own, increasing both of their pleasure. 17 was being squeezed inside his sisters tight pussy and he loved it.
"Oh god sis, your so tight! How do you stay so tight?"
"Android pussy is the best in the world 17."
"So is android cock,admit it sis no one has a cock like mine, no one can fuck you like I can."
Android 17 then pulled his cock completely out of 18's pussy and quickly flipped her over on to her back. Kneeling between her legs, which she immediately spread as far as she could for him, he speared her pussy with his cock. Pushing as far as he could into her as fast as he could 17 fucked his sister with a **** humans were incapable of. The **** of their wild fucking was literally pounding a hole in the ground and creating a large crater in the street.
"Admit it sis, no human could ever fuck you like this. No human could ever make you feel as good as you do right now."
18 had wrapped her legs around 17's waist and her arms around his neck, she was panting heavily as her brother fucked her harder than she had ever been fucked before.
"Really? Than fuck me harder 17. Come on do it as hard as you can!"
17 increased his power level and put all the energy into his movements. He started pounding away inside his sisters pussy with a **** he had used only in battle before and never in sex. His movements were a blur and his **** sent shockwaves through the earth that shattered windows. His own breathing was heavy as this was also the best sex in his life and he was getting very close to cumming inside 18's pussy.
"Uh, Is this what you want sis? Is this hard enough to prove to you my point?"
"OH GOD YES! FUCK ME 17 FUCK ME HARD!"
"Sayit,say you don't need anyone else that no one fucks you like I do!"
"Yes no one fucks me like my brother! I don't need or want any other dick than your's!"
With her admission both 17 and 18 reached their climax at the same time. 18 buried his cock to the root insid ehis sister and let loose with so much cum that some of it leaked out of her pussy ran down her ass cheeks and pooled onto the ground. 18's pussy contracted like mad as her own orgasm crashed through her body sending waves of unbelievable pleasure through her.
this had undoubtedly been the best sex of her life and she meant it when she said she needed or wanted no one else, but that didn't meen she wasn't going to still have some fun teasing her brother. Looking up at him she smiled and said.
"O.K. now my ass."