Siblings with Benefits Ch. 35

"Oh yeah," Dawn panted as I continued to tongue fuck her. "Oh you do love your sister's pussy don't you? I... ooooh!"

Dawn gasped, as holding my tongue inside of her I sucked hard and was rewarded with a mouthful of her delicious nectar. Letting go of her ass, I wrapped my arms around her thighs, and using both hands spread her smooth pussy wide open. I inhaled, again enjoying the sharp aroma of her sex, before sliding my tongue up through her soft wet folds. Dawn's hips twitched as the tip of my tongue again found her hard pink button. I traced a slow circle around it causing her to release a sexy whimper that made me do it again, but even slower this time. Leaving her clit, I slid back down through her now dripping pussy and pushed my tongue back inside of her.

"Hold it still." Dawn whispered.

Doing as she said I kept my tongue rigid as Dawn began to lift her hips up and down. Her movements caused my tongue to slide up and down the length of her pussy. When I reached her clit Dawn swung her hips in a circular motion causing my tongue to swirl around it. After several passes through her pussy, Dawn pushed her hips up higher causing my tongue to slide past her pussy and directly into the tip of her ass. With no hesitation I pushed my tongue into her tight asshole causing her to squeal in delight.

"Ohhh you naughty boy, licking your sister's ass!"

She pushed harder into me, forcing my tongue in deeper and burying my nose into her hot moist flesh. Dawn lowered her hips bringing my tongue back up through her pussy to tease around her clit several times. Dawn moaned and lolling her head back said softly; "Oh look at that."

Turning my eyes up to the mirror, I let out a soft moan of my own. Dawn's long white body looked incredible lying across mine. Better yet however, was how good my face looked buried in her pussy. Dawn was looking back at me in the mirror and she winked as our eyes met in the reflection. She arched her back higher as she began pumping her hips faster against my tongue. Dawn let her head go back even further, and I could feel her long black hair teasing across my legs as her body rocked up and down. My eyes left her face, to trail down and linger on those small but delicious looking tits with their perfect nipples.

Again my mind seemed to become blurry as Dawn's face became my sister's. Megan's eyes closed, and her lips parted as her breathing became heavier. My sister started rocking her hips even faster and now, keeping my tongue on and around her clit rather than sliding back down. I could feel her creamy white thighs trembling against my arms and started swirling my tongue rapidly around her clit.

"No, I said stay still." Megan said quietly, and opening her eyes smiled at me in the mirror. "You be a good boy and follow the rules, your big sister will give you a treat!"

I quickly stopped moving my tongue, as Megan always made the rules, and I knew what she meant by a treat! A treat meant getting to cum in my big sister's face when we were done...

"She is not Megan and you are not eighteen Mark!" The Voice said.

I blinked as there seemed to be actual concern in its tone. My mind cleared and I saw Dawn's eyes open and heard her begin to whimper as her hips ground into my face feverishly. Despite my bodies body's exhausted state I could feel my cock twitching between my legs as I watched Dawn continue to tease herself. Her legs were shaking badly, and her whimpers had a hint of desperation to them as every part of her body strained to cum. Well she hadn't said anything about my hands I thought as, letting go of her pussy, I slid them up across her hard flat stomach. I watched in the mirror as my hand grabbed her firm tits and gently pinched her nipples.

"Oh, oh oh yes!!" Dawn cried out. "Oh please baby just a little harder I... Oh!!"

Gasping, Dawn clamped her thighs around my head, and arching her back let out a scream that was every bit as loud as any my sister had ever made. Forgetting the rules I started sliding my tongue around her sensitive clit as she ground her sopping pussy into my face. I moaned into her dripping flesh as I watched Dawn thrash wildly on top of me as she squealed and moaned. I kept squeezing her nipples as I continued to tongue her, and with another loud cry, I felt her thighs clench around me. Dawn released a long loud whimper, as her body was rocked with another spasm of pleasure.

Releasing my head from her thighs Dawn let my knees go, and collapsed panting across my legs. I was breathing hard myself, as it had been difficult to breathe while being smothered against Dawn's gushing pussy.

"Oh wow!" Dawn gasped. "Oh goddamn, you are a good boy aren't you little brother?"

"Anything for my sister."

"Oh that is such a good answer!" Dawn exclaimed. Smiling up at me she asked; "Ready for your treat little brother?"

Swinging her right leg over my head Dawn rolled off of me. Getting to her knees between my legs she smiled and began slowly crawling up my body. She was keeping herself low enough that I could feel her hard nipples sliding their way up my body. Dawn stopped when she was straddling my waist and leaning over placed her left tit, the one I had bitten last night in my mouth. I gently sucked her nipple into my mouth, softly teasing it with my tongue.

"There you go, nice and easy on your sister's tits."

Dawn removed her tit from my mouth so she could turn and offer me the other. I slid my hands around her waist and up her smooth back, and she sighed as my mouth continued to work on her nipple.

"Hmmm," She moaned. "Time for that treat."

Reaching down between her legs, Dawn grabbed my semi hard cock. As turned on as I was by her I had to admit that for one of the few times in my life, I wasn't sure I could again. My head was still throbbing faintly and I hadn't moved that much because I really didn't know if I would be able to. Guiding my cock to her, Dawn began to rub it up and down her pussy. I groaned as I could hear how wet she was, but my cock wasn't getting much harder.

"Aww, someone's tired." Dawn said smiling sweetly at me, while her tit was still in my mouth. "Your big sister gave you quite a workout last night didn't she?"

I moaned around her tit as she began rocking her hips, pushing my cock harder through her wet lips.

"Come on baby, I can't give you your treat if you don't get hard for me."

Removing her tit from my lips, Dawn leaned over putting her lips to my ear, and whispering;

"Make it hard little brother," She moaned as I felt my cock twitch as she spoke. "Oh that's it Mark, show your big sister how much you want her."

I let out one of those little whimpers as I could feel my cock aching yet growing hard as she began rocking faster on it.

"Oh yeah, there it is! There's that nice huge hard cock." She giggled. "That's right little brother, you're always hard for your big sister aren't you?"

"Yes," I said softy. "My sister's pussy is my favorite...."

I couldn't finish as Dawn let her weight go, impaling herself on my now fully erect cock.

"Oh damn that's so fucking deep!" Dawn groaned as she sat straight up, driving me all the way into her unbelievably hot pussy.

As I held her hips Dawn started sliding back and forth keeping me inside of her as she slowly rode me.

"Damn I love these mirrors" she exclaimed as she watched herself fuck me.

Leaning over and bracing her hands on my shoulders she began lifting her hips and driving them back down on me. We both gasped as she started going faster and harder, drawing my cock almost all the way out of her before slamming herself back down. I winced as the sweat on my back began causing the scratches to burn, and the muscles in my shoulders aching as she drove her hands against me.

"Oh yeah, my brother's got plenty left for his sister doesn't he!"

"Not really, in fact.... Whoa!!"

Dawn had pulled my cock from her pussy and with a wicked smile had guided it further back.

"Time for your treat."

With no hesitation Dawn rocked back pushing my huge prick into her tight ass.

"Ohhhh okay, maybe it's a treat for me too!" She laughed. "I.... oh fuck yeah!!"

Dawn cried out as she went all the way back shoving my entire length into her.

I gasped as I could feel my thick cock stretching the tight muscles of her ass until I was fully inside. Dawn groaned as she wiggled her hips, working herself down until I felt the cheeks of her ass against my thighs.

"Oh God that fucking feels good!"

I moaned as Dawn once again started rocking back and forth, sliding my cock in and out of her ass. After several long slow strokes, Dawn dug her nails into my shoulders and began bouncing up and down as hard as she had when my cock had been in her pussy.

"Yes oh yes!!" She yelled as she drove herself on and off of me.

I looked up into the mirror and groaned at the look on her face. Dawn's eyes were closed and her mouth wide open as she took over ten inches of cock in her ass as easily as if it were her pussy. Despite my exhaustion, that look drove me wild. Reaching up, I grabbed her shoulders and pulled her down so that her chest was against mine. Before she could move I wrapped my arms tightly around her back pinning her to me. Holding her still I started savagely pumping my hips, driving my huge dick into her ass.

"Oh my fucking God!!" Dawn screamed directly into my ear.

"Yeah you like that cock in your ass?"

"Oh fuck yeah!!!" She squealed as bending legs I put my feet flat on the bed and began using longer harder thrusts.

"Oh yes! Oh, look at you fucking your sister in the ass oh you bad... oh!!"

With a wrench that sent a flash of pain through my gouged back, I turned to the side, flipping Dawn off of me. Ignoring the shooting pain in my temples, I got to my knees and grabbing Dawn by the hips pulled her onto hers.

"Oh yeah, you're really going to give it to your sister aren't you?"

My answer was to squeeze her hips, and in one smooth motion plunge my long hard cock back into her asshole. Dawn lifted her head and screamed as I reared back and began fucking her so hard she would have been pushed off the bed had I not been holding her. Dawn's screams became one continuous wail as closing my eyes, I went even harder and faster, using all the power in my hips and thighs.

"Oh fuck!!!" Dawn cried out. "Oh my fucking... Ohhhh"

Dawn moaned as whipping it out of her ass I plunged my cock into her sopping wet pussy. I resumed tearing into her, but this time her moans were ones of pleasure more than pain. For the next several minutes I worked both her holes, giving her pussy several long hard strokes before sliding up and drilling her ass. The effect was amazing; Dawn was going from cries of ecstasy, to squeals of pain then back again.

As I continued assaulting her body with my massive cock, I stared transfixed by the sight of us in the mirror. Dawn's face was a mass of sweat, her black hair plastering to the sides of her face, and her expressions were switching from pain to pleasure as I alternated between her ass and pussy. No matter which hole I was tearing into however, the look in her eyes was one of pure lust. I tore my gaze from her to look at my own reflection. My arms were flexed as I was pulling dawn into each thrust and sweat was pouring down my muscular chest and stomach. My eyes, which were so dark they appeared black, had the same wild look in them Dawn's had.

I gasped as the pain in my temples increased and I realized that as hard as I was fucking I didn't seem to be able to cum. I tried to fuck her even harder and became aware of my balls beginning to ache. I closed my eyes and like Dawn had earlier, strained to cum. I pulled my cock from her ass, shoving it back into her wet pussy as I could feel my cock becoming raw from slamming her tighter drier ass. I heard a gasping sound and realized it was me. I was breathing like a bull and my heart felt as if it were going to pound through my chest. The pounding in my chest was in perfect rhythm to the throbbing in my head and even the aching in my balls was getting worse.

"Keep going pussy! We never get enough!"

I let out a whimper as I felt the first twinges of feeling as if I were going to cum.

"Oh yeah!" Dawn cried out. "There you go baby!"

"Little brother." I gasped as sliding my hands up her back; I pushed her into the bed causing my cock to drive in even deeper. "Tell me!"

"Yes little brother!!" She screamed. "Oh fuck me!! Fuck your big sister!! Pound her tight fucking pussy, fuck her in her ass! Your slut of a sister!!"

"Yes!!" I yelled as I felt my legs start to shake badly, and the orgasm getting closer. "More!!"

"A whore!" Dawn squealed out. "Your sister's a fucking whore! Fuck her like one! Come on baby, fuck your nasty slutty big sister!! Give her every... Ohhh Yes!!!"

With a loud cry I whipped my cock from her pussy, shoved the tip into her ass and moaned as much in relief as pleasure as my cock twitched and sent a long hot stream of cum into Dawns quivering ass.

"Ohhh you are soooo bad!" Dawn moaned as I jerked myself into her.

I groaned again as the next much smaller spurt of cum was accompanied by a pain in both my balls and my cock. I gave my cock a couple of more quick pumps and I winced as the few drops that came out caused the pain to increase. Sliding my cock from Dawns ass I unceremoniously fell onto the bed next to her gasping for breath. Dawn didn't seem to notice as I saw in the mirror that she was lying with her face in the pillow also breathing hard. I closed my eyes against the tremendous pounding in my temples, and began breathing through my mouth as I couldn't catch my breath.

My heart was hammering in my chest and for a brief moment I wondered if I was going to have a stroke.

"What a way to go!

Slowly, a little at a time I could feel my heart slow down and my breathing became more regular. Unfortunately the pounding in my temples had not receded, but at least I knew I wasn't going to die, just felt like I was.

"Holy shit Mark!" Dawn said as she rolled onto her side to face me. "You are something else!" She shook her head. "Christ I have never fucked like that!"

"I...I..." paused to catch my breath. "Doubt that."

"Well I mean, maybe once, but damn Mark that was like the fifth time plus the blowjob! I mean I could tell you were in shape but..." Her eyes narrowed. "You okay?"

"Yeah," I answered softy. "Just tired, drank all night before I met you."

"Well tell you what," Dawn began, sliding over and putting her hand on my chest. "How about we go back to sleep, I promise I'll leave you alone for at least a couple of hours then... Oh shit!!" She exclaimed.

"What?" I asked sitting up quickly. My head spun and I had to put my hand behind me to not fall back into the bed.

"It's almost 11:30, and it's Saturday!" As she spoke Dawn sat up and swinging her legs off the bed stood up.

"I have a twelve o' clock lab today, I almost forgot about it."

Dawn reached down and picking up her red thong slid it on.

"Lab?" I asked, letting myself sink back down into the pillows.

"Yeah," she began as she pulled up the short black skirt she had come over in. "I'm pre-med at Brown and today's class is already a makeup."

"Pre- med?"

"Yup," She laughed as she put her bra on. "That's why I'm not for sale like the rest of those girls. I'm making a few hundred a week shaking what I got, but I've got too bright a future to get arrested over prostitution." She shrugged as she slipped her black tank top over her head.

"Besides as you can tell I love to have fun, but I fuck who I want to fuck."

As I watched her sit on the bed and pull her boots on, I found myself thinking of asking her about her financial situation. Maybe she'd rather not strip if there was another option. After all it had been awhile since I had a pet. Just like Samantha, none of my pets had been brainless bimbos. All the girls that I had traded tuition help and living arrangements for sex, had not only been collage students, but had all been academically exceptional. Intelligent, driven, young women who were willing to do anything they needed to, to make sure they got what they needed to succeed.

"Mark stop it, you're getting carried away."

No, really, I forced myself to think through the pounding. Look at her, beautiful, she's a freak, already knows how to play the game, and if she's pre-med she's got to be pretty...

"Yes Mark look at her," The Voice began. "The last thing we need right now is for you to be playing house with Mini Meg over there. Christ, you'll be telling her that her name has to be Megan next time if get any more pathetic."

Whatever, hell you've been pushing me to have fun.

"Mark you're fucked up right now," The Voice said. "You really are."

Course I am, would I be talking to you if I weren't?

"It's different Mark you need to stop thinking about Megan, and get your shit together."

"Well hey," Dawn began as she stood up, grabbing her purse off of the nightstand. "Saying last night was great is an understatement, feel free to give me a call whenever."

"Sounds good." I said and forcing myself to move got off of the bed. "Hey uh, you didn't want to shower?"

"No time," Dawn said pointing at the alarm clock. "As it is I'll just make it." She gave me a wink. "Guess I'll have to just sit in class with you dripping out of me."

As she spoke I reached down and grabbed the pair of black karate pants I hung around the house in. I winced as the blood rushed to my head when I bent over, and when I straightened the room was spinning. I sat down on the edge of the bed slipping them on and looked up to see Dawn had come over to my side of the bed. Leaning over she gave me a kiss while reaching down and giving my cock a quick squeeze.

"See you later," She grinned. "Little brother."

"I'll walk you down to your car." I said standing.

"Oh, okay." She said smiling.

I slipped my sneakers on and started to walk past her out of the bedroom.

"Hey Mark?"

"What?"

"Umm, I know you're probably not someone who cares about what people think, but you really might want to put a shirt on."

I looked over my shoulder into the mirror and winced. Part of me wanted to say fuck it, who cared what the assholes in the building thought. On the other hand, I'd caught enough shit lately and all I needed was another picture on the net somewhere.

"Good idea." I told her as I went to my bureau and tossed on a plain white t-shirt.

"Hmm, you fill that shirt out pretty well." Dawn said then after looking at me for a moment continued. "Hey Mark can I ask you something?"

"Sure." I said as I opened the bedroom door.

Dawn stopped me with her hand on my arm and looking me in the eye smirked and asked;

"So what's your sister's name?"

"Careful Mark!"

"What are you talking about?" I asked trying to keep my eyes locked onto hers.

"Oh please! That brother sister shit doesn't just come out of thin air." She laughed. "Someone had a crush on their big sister didn't he?"

"Of course not!" I tried to sound convincing. "I read it somewhere and thought it was hot so..."

Dawn shook her head.

"Hey no worries, I don't judge and incest fantasies are a lot more common than you think." She shrugged. "Or at least that's what my psychology teacher says." She winked again. "So what's her name?"

"Megan, and when I was a kid I thought she was the most beautiful girl I'd ever seen." I said softly leaving out the part that I still felt that way.

"Why bother leaving anything out at this point moron?"

Dawn gave me one of those all too familiar big smiles.

"That's cute."

"Yeah whatever," I said rolling my eyes as I guided her out of the bedroom and into the hallway.