"My Turn"

"My turn, Doug" Crystal says, a mischievous smile on her face.

"Uhhh-what?" you stutter. Crystal pulls you back towards her, pressing her dick against your ass. "I said, 'my turn'" she whispers softly in your ear.

With that, she uses her other hand to guide the head of her cock towards your asshole. No matter how much you struggle, you can't seem to escape her grasp, and soon her cockhead makes contact with your anus. The precum oozing out of her tip coats your anus. "I hope you're ready, Doug" she says, slowly pushing herself into you, overwhelming your tight ring. You feel a sharp pain that consumes your mind and yelp in response. She doesn't slow down, though, and the pain gets worse. Soon, though, you feel some amount of pleasure as well. something about your asshole stretching so widely, so completely, is incredibly erotic to you. By the time the pain finally fades completely, you're face down on Crystal's bed, her cock sawing in and out of your ass. You feel her tits pressing into your back, jiggling up and down with her thrusts. You feel her breath in your ear, hot and heavy, every thrust bringing a soft and sexy moan or grunt. You soon realize that she has one arm holding both your wrists between her flat stomach and your back, and the other hand is wrapped around your throat.

It doesn't take long to completely forget any pain that you felt at the beginning of her penetration, and your mind feels like it's melting, unable to focus on anything but the pleasure of her body on yours, in yours. You feel her large tits pressing into your back as she thrusts in and out of you. "I hope you like this, slut, because I sure do. I never thought my brother would be so good... or so willing" she growls into your ear. She moves her head down and softly bites your neck as she pushes herself in even deeper, then stops for a moment to savor the feeling of your ass, painfully stretched around her thick cock. On some level you do actually feel proud of yourself for having been able to take her entire rod, but you're so consumed by the feeling of your older sister's body that forming a coherent thought is difficult.

Crystal soon resumes her ministrations, but this time more slowly, with a gentle rotation to the thrusting. This causes her cock to thud against your prostate, squeezing out copious amounts of precum and sending waves of pleasure through your body. She straightens up, pulling you up to your hands and knees by your throat. You feel her pull out of you, and with her absence you feel an emptiness, an intense longing to be filled again. You feel your asshole gaping from her girth. Crystal pushes you over, telling you to lie on your back. You quickly obey, **** for the feeling of her inside you again. Crystal lowers herself again, lining her dick up with your gaping hole, and slowly thrusts. You moan in ecstasy as her foot long cock pushes into your, pulling your hole open.

You wrap your legs around her back, and you feel her butt push at your legs whenever she attempts to pull out, but no matter how hard you try, you can't keep her from doing so. On the other hand, you can help her thrust harder as she pushes back into you, and you do so with much vigor. You don't know how, but you realize that at some point, Crystal had started to kiss you, and despite your earlier reservations, you now seem completely unable to resist. You breifly think it might have something to do with her massive cock that's plowing into your butt right now, the one whose thick veins you can feel as they slide into your ring and over your prostate, tingling your body with pleasure.

Crystal breaks your kiss for a moment, pulling her head back to look you in the eyes. "Doug, I'm gonna cum in your ass. You can't cum until I do. I want you to beg me for it. Beg for my cum, beg for me to let you cum!" she commands. Of course, the gigantic cock in your ass, coupled with her rock hard body pressed up against yours, stimulating your cock, means you're already on the verge. You just hope you can hold out until she unleashes in you.

"I want your cum so badly, Crys! Please wreck my ass with your cum! fill me up and make me cum on my sister's cock!" you hear a voice yell in the distance. Then you realize it was your voice, that you had said that, but you're so far away, drifting up to the clouds of orgasm.