How I Became Big Sister's Sex Slave - Sex Stories

How I Became Big Sister's Sex Slave

... evening. I would never admit it to myself fully, but in the back of my mind I couldn't help feeling a twinge of jealousy as I watched her stagger up the stairs draped all over some anonymous stud. Whenever I could, I would help Karen clean up the mess the next day, but because of my work schedule Karen had the house to herself a lot, especially during the day. One day, toward the middle of the week I got off work early (it was around two in the afternoon instead of the usual four). When I pulled into the driveway, I noticed that there was another car there besides Karen's, but I didn't think anything of it, figuring it was just one of Karen's friends. I walked into the house, tossed my keys on the kitchen table, and was just thinking of getting something to eat when I heard a noise from upstairs. Bedsprings were creaking like crazy and I heard Karen moan, "Oh yeah, that's it! right there! oh, fuck!" Shit, Karen was fucking some lucky bastard right now, in the middle of the day. For a moment I stood there, motionless at the foot of the stairs, just listening. then I couldn't resist any longer--I just had to check it out. I kicked off my shoes and crept up the stairs as quietly as I could. Score! Karen's bedroom door was partway ajar. (She obviously wasn't expecting me home for a couple more hours). Sneaking passed our shared bathroom, I hid myself behind Karen's partly opened bedroom door as best I could and peeked in. I couldn't believe the sight that greeted me: Karen was ...

... on her hands and knees in the middle of her bed, completely naked, getting fucked hard by two guys at once! the guys both looked vaguely familiar and I figured I'd probably seen them at one of Karen's parties. The guy in back, the one with dark hair, was pounding away in Karen's pussy furiously, while the guy in front of her, a blonde, was holding the back of Karen's head with both hands and sliding his large cock in and out of her willing mouth, fucking her face. The room was filled with moist slurping sounds as Karen's dripping snatch engulfed the dark haired guy's cock, his balls slapping against her ass cheeks, her big tits quivering and flopping as he fucked her. Karen pulled away from the blonde's big cock long enough to scream out: "Yeah, that's it! Fuck my wet pussy! Oh, God! Shit! Ahh, make me cum!!" I couldn't believe it. This was so incredibly hot! My cock was so hard that it was practically tenting out my jeans. I was afraid my zipper was gonna explode. The guy behind Karen really picked up the pace then, slamming his cock into her as hard and fast as he could, pulling out the entire length and then driving it into her until his balls slapped against her red ass cheeks, making her scream and moan as she continued to deep throat the blonde in front of her. "Fuck man, this bitch is awesome," The dark-haired guy grunted as he pummeled my sister's sweet pussy. "Yeah dude, she's really into it," The blonde replied, face fucking Karen until she gagged and his balls were ...