"Fuck me harder, Nick," Sarah urged between moans, as she gripped on to the headboard. I heard her command loud and clear, and somehow managed doubled the speed of my thrusts as well as giving her ass an occasional slap for good measure. I could feel my orgasm building, and it seemed Sarah had sensed it too.
"Hold on, I'm so close," she begged. Sarah's large, curvaceous ass jiggled with each hit; her D-cup tits were doing the same, I imagined- I couldn't see them from my vantage point. She had put her dark brown, shoulder length hair into a short pony tail that draped across her bare back and reached out one hand from her hip to grab it. Pulling back sharply, a squeal of perverse pleasure escaped Sarah's lips. After fucking each other for this long, I knew how she liked it. Rough.
"Cum for me," I said, leaving out the 'bitch' that would have more often than not been there had we been roleplaying Master/Mistress- one of our favourites.
That seemed to do the trick. After a few more thrusts from me, "I'm cumming, I'm cum..." her words trailed away as she was taken over by the waves of her orgasm. That was all the permission I needed. I relaxed my pelvis, firmly gripped her hips again and pulled her into me more than I pushed into her. Sarah's orgasm must have been good, because it was like fucking a rag doll- she had no control of her limbs. It only took about ten more thrusts for my load to coat her pussy. I grunted in pleasure as I did, that was one of the best orgasms I had experienced in a long time.
Eventually, after what seemed like an age, I pulled out, my cock dripping. Sarah was half still in the position, half collapsed on the bed, but on feeling me pull out she rolled over on to her back. Her heavy breathing caused her tits to rise and fall a great deal, and this only made her flat, muscled stomach look even better. I was still kneeling, giving me a great view of her young, nubile body. Her face was a picture of beauty, and her make-up was always perfect- not that she needed it. She was naturally white skinned but always had a tan, which was a perfect constant all over her body thanks to sunbathing naked on the beach and in the yard. The only break in this was the baby pink of her areolas, that framed her cute and small nipples that were hard enough to cut glass after that. Her tiny waist and washboard stomach afforded her an hour glass figure, and made her hips stand out.
She had a sliver of pubic hair, in the form of a central strip. Sarah's pussy was one of the only ones I had ever seen that I actually found attractive rather than ugly. Her toned, slim frame (she lived in the gym), meant it did not stick out and the lips were not protruding either. Many thought her long legs with perfect thigh gap were her stand out feature, but they weren't lucky enough to have seen the rest of her. I sometimes wondered how I was related to such a goddess. Though, with my tall and muscular figure, cut jawline and, according to Sarah, the best ass on any guy she had ever seen, I guess I was not too bad looking either.
I collapsed on the bed next to my sister, and realised I was still panting a little bit too.
"That good for you?" I asked jokingly, clearly already knowing the answer.
"Average, I've had better," Sarah giggled.
"Tell that to my cock, he's drowned in your juices."
"Oh, really?"
Sarah rolled over so she was on top of me, her breasts suffocating me in the nicest way possible. That would be a good way to go, I thought. She slid down my body, her dripping pussy leaving a trail of bodily fluids as she went. Without warning, her mouth enveloped my tender cock, forcing a deep intake of breath. I felt my member growing with each passing second, as it was comforted by the warmth of her mouth. My sister gave the best head, not that I would tell her that for the sake of keeping her ego small enough to get through the door; my cock clearly was not aware of the plan and grew to its full size within the minute, despite having just cum.
"Looks like someone wants a round two," Sarah noted, taking my cock out of her mouth for a second so she could speak. Yes, it was that big.
"Mom and Dad will be home any minute," I warned.
"The shower it is then, I'll meet you in there," my sister said, and with one last suck she jumped up and headed for the door. I watched her ass jiggle as her hips sashayed their way out of view. Still at full mast, I did the same and headed towards my en-suite bathroom and got in to the large, walk-in shower. I knew where she was going, this was a tried and tested system: first, she would turn her shower on and put some music on that would be too loud for their parents to shout over. Then Sarah would lock the door from the outside using a coin on the safety lock, and come and join me in my shower so I could fuck the shit out of her without our innocent, church going parents knowing.
Her absence gave me a few moments to reflect how we had got ourselves into this. Sarah was the older of the two us, at 21 compared to my 19. Many moons ago, I had a date. I had never been on a date before, and I was nervous as hell. What would I say? What would I do? What if she wanted to kiss me? So, I turned to the most sexually experienced person I knew: Sarah. She had a reputation at school for being, well, promiscuous shall we say; in actual fact, it meant she had fucked half of her grade and half of the grade above. Okay, maybe that was an exaggeration, but her number was high. No wonder, looking at her; every guy would have given their right arm to even speak to her, never mind fuck her. My friends used to tease me about jerking off to her Instagram page. Even I thought she was hot, as weird as that was. She was the queen bee, the head cheerleader, the whole shebang.
Meanwhile, little, old, sickly me was stuck at home half the time. I had Crohn's disease (google it), which meant my attendance record was below 50%. Luckily, I was a bright kid and still managed to maintain my position at the top of the class. Unfortunately, the same could not be said for my dating life. Socially I was fine, loads of friends, hung out with them a lot, but girls were a different ball game. I mean, I didn't struggle when talking to them, it was more getting the chance to when I was hardly at school. Equally, shitting yourself (thanks, Crohn's) was not all that sexy.
So, when I started speaking to this girl called Emily, who was of Chinese heritage and was simply stunning, I wasn't going to mess it up and asked Sarah for advice. She coached me, on what to say, what to wear, how to act. Then I asked her how to kiss; I thought she was going to explain. However, it turns out my sister was a more 'lips on' kind of teacher. She planted them on me, and told me to kiss back. Surprised, I did and she had me make little adjustments as we went. By the end of it, I was hard which made me blush and feel sick at the same time. I admonished her, saying she's my sister. Sarah told me to loosen up, no one would know and it was none of their damn business (which happened to be our motto since.
That was just the start, though. I went on the date, got the kiss (which Emily said was the best first kiss she had ever had, thanks sis) and secured a second date. On said date, I reached a new milestone: cumming without having anything to do it myself. We were making out, I naturally got hard, Emily noticed and jerked me off in the parking lot of a Taco Bell. After we had cleaned up, she said she had to get back not to break her curfew but that I could return the favour next time. This made me ice run cold, I had no idea what she meant, never mind what to do. Once again, I turned to my relationship-cum-sex coach (pun intended) and asked her. She informed me Emily wanted me to finger her, preferably to orgasm. Naively, I expected an explanation or a diagram, instead I found my fingers three inches deep in my sister's pussy.
And so, it went on. Each week there would be a new, alien sex act and my sister would show me the ropes. Emily was my first everything, all the way up to sex- or rather, was she my second everything? The first time I fucked Sarah, following her instructions, much to everyone's surprise she orgasmed. Little old virgin me had made my slut of a sister orgasm. I mean, we had practised oral and it was the third round after I came in 12 second the first time, but I still made her cum. After that, the 'demonstrations' became a bit more regular and my slutty sister became a lot less slutty now she had access to sex on tap at home. Emily and I broke up after around six months, with her citing the feeling another woman was involved (little did she know), but Sarah and I carried on. In fact, neither of us had dated anyone else since then; my health had deteriorated which meant I didn't get out as much, though had recently improved, and Sarah had just started a modelling career that she was focused on (which meant trying not to fuck a colleague and get fired). We settled into our routine, and each other, satisfied that this particular need was taken care for. The romantic stuff, with other people, could come later.
