We had never gotten along, no love lost between brother and sister. We were both extremely competitive and constantly had to prove to each other that they were better than the other. So, when I walked in on him jerking off in the middle of the living room it didn't take long for the arguing to begin.
"You're nothing but a horny pervert!" I mocked him. "You better keep jerking off because you'd be unable to please anyone anyway."
"Fuck you." He retorted. "Like you could make anyone come. I've made girls come in seconds countless of times."
"Ha! You mean when they sound like this?" I moaned, faking an orgasm, imitating the sound I was sure he had heard before.
"I'm sure you've had time to practice that before as guys could impossible keep hard enough with you to manage to please you."
"You'd be harder than diamond the moment I'd stand naked before you." He raised his eyebrow, and when I realized I mentioned him I had to work hard to hide my embarrassment.
"You couldn't make me hard even if you tried your hardest." He challenged. "You'd be a quivering mess the moment I touched you."
"I could make you cum in less than two minutes with my hands without barely trying!" I was actually getting a bit angry at him by now.
"Ha! I'd prove it to you if I could."
"Challenge accepted." He said to my great surprise. "You know what, I'll even give you ten minutes! If you manage, I'll admit to being a horny, useless perv, if you fail, you'll do the same."
I refused to give up to him, walking up to stand in front of him in the sofa.
I got down on my knees before him, helped him pull off his pants and grabbed his dick in his underwear.
"Rock hard already?" I mocked him. "So just the thought of me doing it made you this hard."
"Don't flatter yourself." He retorted. "I'm just still hard from feeling myself. Look at it as a head start."
His words made me even angrier, and to prove him wrong I started moving my hands up and down my brother's cock. I let my fingers gently rub across as my thumb massaged it, making sure to pull up his foreskin and gently rub it between my fingers as I reached the top. Moving down, the tip of my fingers enveloped the head and carefully moved down with his foreskin.
My other hand had a grip around his balls, soft enough not to hurt, but hard enough to keep him on edge. I kept going slowly up and down, waiting for a sign to increase the tempo.
Already?! He hadn't even reacted yet and a third of the time had almost passed. I increased the tempo, hoping to get a reaction.
His dick was just longer than average, but it was thick enough that my fingers didn’t reach all the way around. I had to admit it was pleasing to look at as well. Damnit, I was even getting horny myself and he still hadn't reacted!
"Just two minutes left." he stated calmly.
What the hell?! I had never had problems making guys cum before. In this pace, I'd lose!
"Damnit!" I blurted out. "If it were my mouth, you'd cum at once!"
"Really? Alright, I'll give you ten more minutes. Feel free to do anything to make me cum by then."
"Anything?" I asked, hesitantly.
"ANYTHING." He confirmed.
Not one to waste time, I leaned in and put my lips around his cock. I let my tongue play around with the head, making sure to playfully suckle on his foreskin as I slowly moved my lips down the shaft, my tongue moving around it as I went further and further down.
I wasn’t a stranger to giving blowjobs, and soon I felt the tip against the back of my throat as I reached the base. Staying there, I wrapped my tongue around his cock and let it caress it as the tip played with his balls.
"Three minutes up." He calmly stated. "Again."
I couldn't take this anymore! I was losing it! I let go of his cock and quickly pulled my top off, followed by my bra, and pushed my breasts against his cock as I returned to sucking it. I had always had the largest tits in class, so giving titty-jobs had become somewhat of my specialty.
His cock was swallowed between my soft breasts and my lips and tongue playfully suckled the tip as it pushed up between them.
Already!? Hell, I had no time to spare. Now, I was desperate. I stood up, pushed down so that he lied down in the sofa as I pulled down my skirt and panties in one go. I got on top of him, turned around and let my pussy hover just an inch in front of his face as I started bobbing my head quickly up and down his cock, hitting the base with each go.
I could even feel mu juices drip down into his mouth, gushing even more as I felt his cock twitch slightly, expecting his cum to fill my mouth any second now.
"Time's up." I felt his warm breath against my crotch as he spoke, so on edge horny that it almost made me come.
"Fuck you!" I screamed in anger. "I still don't think you'd be able to please anyone."
"Alright, challenge accepted." He said, still irritatingly calm. "Double or nothing; if I can't make you cum, I'll be your slave for a month, if I do, you'll be mine."
He didn't even wait for an answer before pushing me down and laying on top of me.
"B... But what about time limit?" I asked, flustered as he took action. He leaned his head in toward my ear as I felt the tip of his cock against my pussy, making it tremble in response.
"Not needed." He whispered into my ear. "You'll come in just seconds."
He pushed it in, slowly and gently, and I bit my lip trying to hold back the moans as it slowly went in deeper and deeper into my soaking wet pussy. As it pushed hard against my cervix, I felt a tingling sensation flow throughout my entire body.
Pulling back again he quickly increased the tempo, and with the second push I moaned out loudly in pure bliss. With the third push his lips pushed against mine and our tongues met in a passionate kiss as I felt the orgasm rush over me.
He pound, and pound, and pound and each repetition pushed my ecstasy even higher and it felt like I'd pass out from sheer pleasure.
Pulling out, he left me laying there in a wet, trembling mess, unable to move as I was in heaven. I barely even noticed how he grabbed my hips, turned me over, pulled me up on my knees as he started fucking me from behind.
I didn’t realize until his cock pushed into me, quickly skyrocketing my pleasure again, and I felt him push hard against my uterus and his balls slap against my clit each time.
I came, or maybe it was all one long orgasm, it was impossible to determine, and he pulled out again and my body fell down in a slump, ass up into the air.
His hand grabbed my butt, and I felt his thumb push into my ass and the four rest of his fingers right into my eyes, quickly edging me even further.
Still orgasming, I felt his cock push deep into me and now he picked up the pace, fucking me harder than I've ever been fucked before, with both his fingers and cock shoved inside me.
His cock trembled, pulsating, and I could feel his warm seed pour almost straight into my womb as he leaned in and moaned into my ear, making my mind completely blank as I had become a slave of pleasure and lust.
His shaft kept pumping, more and more of his seed flowing into me and I felt his warm breath into my ear.
"I win." He whispered. "Guess I won't have to masturbate from now on."
With a dumb, blissful smile on my face I was really looking forward to the coming month.
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