“Mark?” Shelby whispered.
“Mmm?” Mark murmured between slow licks.
“Mark, I need you to eat my pussy faster or fuck me. I need to cum, badly.”
Mark, still slowly licking his sisters dripping pussy debated on holding out longer, or feeding his sisters cunt his cock.
With one quick, final, flick of his tongue against her clit, Mark started moving up Shelbys body, paying attention to each of her fat cinnamon colored nipples until they were erect and glistening with his spit.
This was it, there would be no going back after this. As soon as he slid his cock in her pussy they would be breaking the final taboo barrier. A brother fucking his sister.
Mark began rubbing the head of his cock up and down her gash, coating the cockhead in her pussy juice. The feeling was exquisite. Wrong in so many ways yet right in all the important ones.
Just as Mark started slowly feeding his cock to her pussy, Shelby told him “Mark. I need you to promise me something. Do not, no matter what I say, cum in me. Ok?”
Mark, only half listening and more trying to focus on not blowing his load could only nod his head in the affirmative.
“Then fuck your sister’s pussy, baby brother.”
Without further ado, Mark slid his cock in one thrust until his balls were flush against Shelbys ass.
“Oooh, fuck. You’re huge!” Shelby groaned. A flush was creeping up Marks chest and along his neck, a groan resounding from his throat.
The brother and sister had done it. His bare cock was seated deep in his sisters clenching pussy.
His sister’s pussy was tight, almost painfully tight. Each clench of her pussy gripped him tightly and if he didn’t focus he would cum before either of them were ready.
Raising her knees to her chest, Shelby opened her pussy to give her brother deeper access. Allowing Mark to hit her clit and g-spot at the same time.
Mark slowly drew back his hips, leaving on the tip in before sliding back in to his sisters pussy. “Oh, fuck your pussy feels so fucking good Shell, fuck.”
“Oh, fuck, Mark. Fuck me. Forget what I said earlier, I want you to cum in me. I want to cum on your fat cock as you’re cumming in my pussy.”
Thrusting faster and deeper, Mark reached between them and started rubbing Shelbys clit. He wanted her to cum on his cock and he wasn’t going to last much longer.
Forgetting entirely the need to be quiet, the siblings started fucking with wild abandon. Mark, thrusting his fat cock in to his sisters creamy pussy, both moaning together. Shelby, pinching and pulling her nipples, with little pulses hitting her clit. Amplifying the feel of Mark rubbing her clit and his cock hitting her g-spot.
“Oh, fuck Shell. I’m going to cum all in that nice little pussy, baby.”
Just the words alone pushed Shelby to the brink. Knowing that her body was going to make him cum.
“Ah! Fuck, yes Mark. I’m going to cum on that fat cock. Fuck-fuck-fuck!”
Shelby’s body drew tight as her pussy gripped onto Mark’s cock, clenching him for all he was worth. With one final thrust, Mark started spurting his cum deep in his sisters pussy as she came all over his cock. The clench and pull was almost enough to get him horny again.