Brandon gets Mads

Fuck it, Brandon thought. He didn't know whether it was the grief over his ending relationship or if he was just horny enough to fuck his sister, but Brandon found himself liking the idea more and more. His hard cock was already buried between her panty covered ass cheeks, solid and hard as it twitched against her warmth. All he would have to do is push her panties to the side and he could guide his cock right in.

And that's exactly what he did, tugging at his own boxers first so that his cock popped out of the slip along the crotch. Then his hand moved to Madison's toned ass, firm from years of sports, and slipped his fingers underneath the soft, thin fabric of her underwear. Clenching his fist, he gathered the material up in his hand, and pulled it roughly to one side, instantly feeling the wet heat radiating from her crotch. With his other hand he grasped his shaft, and wiggled his cock until it found her dripping , hot entrance.

"Ah, I take that as a yes," Madison moaned, feeling the fat head of Brandon's cock knocking for permission against her pussy hole.

"It's a fuck yes," Brandon growled as he pressed his cock against her, feeling it ease in as her pussy opened to allow him inside. "Shit, you're tight, Mads. Shit, this is so wrong, but it's so hot. My cock is so hard for you. I don't think I've ever been this hard before."

"I...I can feel it," Madison whispered between gasps, reaching back and grabbing Brandon's neck. "Your cock...it's like a piece of steel, like a warm, fleshy piece of steel. And I'm so wet...can you feel me dripping over your cock already? Oooh."

Her pussy clenched around his cock as he slid in deeper. She was incredibly wet, her juices pouring out over his shaft, lubricating and allowing it deeper still. And as he went deeper, her pussy walls clenched more, constricting around the cock that was filling her.

"Yes, fuck, your pussy feels so good, Mads," Brandon said, his cock fully inside his sibling's pussy. "I can't believe how wet and tight my sister's pussy is."

"And I can't believe how hot it is to have my brother's cock inside me," Madison moaned back. "Every time I think it's a nice feeling, I remember it's my brother's cock and it just makes it so much hotter."

"This is so wrong," Brandon reminded her, even as he began to thrust in and out of his sister's pussy with short, slow strokes. "I shouldn't be fucking you, Mads. This is ****. **** shouldn't feel this good. Fuck, how do they expect me to resist fucking my sister when you're this fucking sexy."

"Mmmm, yeah, fuck your sister," Madison encouraged him, grinding her ass back against his thrusting. "I knew my brother's cock would be the best. I knew feeling it inside me would be better than anything else. It...it is wrong but I don't want to stop. I want more. I want more of you cock. I want it harder, and deeper. Give it to your sister."

Brandon complied happily, his short, slow strokes becoming long, deep pumps, as he drew his cock completely out of her gaping snatch and then plunged himself inside again. His balls slapped noisily against her thighs as her pussy squelched at being plugged by her brother's cock. He pulled out again, and filled her again, pacing the repeats at first and then speeding up.

"Ooooh, oh yeah, that's it, slam that cock into your sister," Madison moaned, bucking back against his cock as it sank into her again. "This...this is wrong but I don't want to stop. You're not gonna stop, are you? You're gonna keep fucking your sister until she cums, right?"

"Fuck, Mads. Your pussy is so hot, I might not even stop then," Brandon warned.

"That's ok, Bran. Fuck me as much as you want, bro. I'll take it all. I'll take all of your cock. And all of your cum. Whatever makes my brother happy," she gasped as the cock pumping in and out of her cunt sent shudders through her body. "Because whatever makes my brother happy, makes me happy."

Brandon knew that she didn't just mean that in the normal, loving sense. Literally, he could feel an odd out of body arousal that coupled with his own. He felt it spike, twisting inside his body, and every time it shot up, moments later, without fail, Madison would throw her head back and moan. And when he felt himself getting close, Madison would whimper, feeling his arousal pulse as his balls tightened.

"Ah...I'm being so greedy, but I have another demand. I don't mean to be so greedy, but your cock, it's so hot, it's filling me so good, it's made me needy." Madison groaned, turning her head slightly to look Brandon in the face as she spoke. "Is that ok? Can I ask one more thing of you?"

"Anything," Brandon said sincerely.

"Kiss me."

Without hesitation, Brandon pressed his lips against his sister, their mouths moving as their tongues wrestled in the middle. They licked and lapped at each other, tasting the saliva of their sibling, kissing as only lovers should. Though, of course, they were lovers now, their sibling bond having grown into a sexual connection. Their twin sense meeting it's full use, to feel each other's complete and utter pleasure and feeding it back and forth.

Their bodies were slick with sweat, their flesh slapping wetly as Brandon slammed his crotch against Madison's hips. Their bodies continued to grind together, thrusting and rolling, pressing and gripping, sweat lubricating their whole bodies. Their movements caused the sleeping bag to be pushed down, the brother and sister coupling sliding out inch by inch as Brandon pistoned his own inches in and out of his sister hot, wet pussy.

It wasn't long before the sleeping bag lay discarded on the floor by their feet, their near naked bodies out in the open as they fucked. Brandon broke the kiss to look down, now fully able to see his cock sinking into his sister's pussy, the sounds of wetness and flesh no longer muffled under the bag. He watched as he pulled out, and saw her lips grip to his shaft, sliding along this hardness. And then he shoved his cock back in, juices leaking out all over his cock and dripping onto the back seat of the car.

Her panties were still in his hand, still being held to one side, but he wanted her naked, completely nude in his hands. So he released the underwear and pulled his cock out. Madison pouted at the loss of his cock, then squealed as he yanked the panties down her legs, leaving them for her to kick off of her feet. Next came his boxers, throwing them off as quick as he could and then slamming back inside his sister. She screamed as he filled her again.

Madison reached behind her back and tried to unclasp her bra. But, it was really hard to think with her brother's cock working its way in and out of her at a furious, erotic pace. And then he was back at her mouth, lips pressed together as they fucked. Her mind was consumed with tasting and feeling her brother fucking her, that she couldn't figure out how to undo a simple clasp. And then, sensing her frustration, Brandon reached up and unsnapped it. Free, Madison pulled the clothing from her body, absolutely naked with her brother now as his cock pumped in and out of her pussy.

Brandon's hands went to her tits, grabbing the fleshly orbs and feeling them bounce against his palms as he thrust into her. But lying, sideways on the back seat, his lower arm was pinned beneath their bodies awkwardly. They both seemed to sense what they wanted, their bodies rolling together as Madison moved on to her knees, her brother holding her hips as he fucked her from behind. With her hands, she reached up and grasped the grab handle above the door, using it to hold her body up and support her as Brandon's hips slammed against her ass.

Brandon looked down again, still seeing his cock sliding in and out of his sister's pussy. But now, above that glorious sight, he also had a delicious view of the puckered pink asshole, flexing every time his cock sank into her pussy. How could very part of his sister looked so hot and fuckable?

Sliding his length into her, Brandon felt his cum rising and knew from Madison's gasping cries that she was close too. He fucked her faster and faster, his sister matching his velocity as she slammed her pussy back against him. Then he looked up, and saw his sister looking over her shoulder, her eyes staring back at him. As soon as he locked eyes with his twin sister, seeing his loving sibling looking back at him with lust, tongue hanging from her mouth, he lost control.

He sank his cock into her one more time, filling her as deep as he could, and felt his cock flex as it released the load from his balls. Spurt after spurt fired from the head of his cock, coating her pussy walls with his cum. He felt that out of body arousal that had been constantly tightening and twisting inside of him as he fucked his sister unfurl, and Madison's body began to shake and tremble.

She'd already been close, her head swimming with pleasure, but feeling her brother cum inside of her, the most wrong of pleasures, her body exploded as every part of her nervous system was overloaded with a perverse delight. Her body spasmed and lost all strength, her hands releasing the grab handle, and without the support her torso fell against the seat. She lay, face sideways against the cushion, arms around her head, fists clenched, her back curved to where her ass sat high above, still impaled on Brandon's cock. She moaned and whimpered continuously as pleasure swirled around in her body.

When finally the pleasure had past, and Brandon sat back, pulling his softened cock from her pussy, Madison breathed again. She looked down below her body and saw his cum dribble out from between her legs, staining the cushion below.

"Fuck, Mads...that was..." Brandon panted.

"I know, Bran, it was..." Her climax addled brain failed to come up with the word to perfectly describe the lewd pleasure her own brother had just given her. "...fuck."

Brandon sat back against the car door, looking at his twin sister, still face down and ass up, with his cum leaking from her pussy lips, and he knew that he had to do this again. He couldn't just fuck his sister once and be done with it. This was something he was going to want to re-experience with her over and over.

"Hey Mads...you said, this was like an experiment, right?" He asked.

"Uh...yeah," Madison mummbled, still recovering from the fucking she'd just received from her own brother.

"You know, the thing about experiments is that you can't just do them once. You have to do it again and again and see if the results are the same...you know?" He said, apprehensive.

Brandon looked between his sister's bare legs, where he could see her cute, exhausted face peeking back at him. And she was smiling.