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Little did I know that having a fight with my sister and the two of us being punished like we were little children would lead to the most exciting sexual experience of my life. I am a senior in high school and my sister is going to the community college nearby. Neither of us ever seemed to hit it off with long term serious relationships. Like any siblings we nag and argue with each other almost constantly. One summer day we were standing in my sister's room yelling at each other over some trivial thing. My mother had it! She stormed into the room and screamed at us that we were acting like a couple of bratty kids and she'd treat us that way.

She grabbed my sister's hairbrush off her dresser and then grabbed me by the arm and sat on the bed. I was so stunned I didn't react. She sat on the bed, reached over and jerked my shorts and underwear down past my knees. She was going to spank me! She hadn't done that to either of us in the last five years! Tugging on my arm she dragged me across her bare thighs with my cock and balls hanging down between them. She grabbed the hairbrush and started spanking my upraised ass. It hurt like hell, but the feel of my cock rubbing Mom's thighs and the warmth of my butt excited me. About 20 strokes later she finally stopped and stood me up. My pants were around my ankles, my cock partially erect, and I had a very red, sore ass. My sister watched this with glee figuring that Mom had taken her side in the dispute. She also snuck more than a few glances at my partially stiff cock during and after the spanking.

Was she surprised when Mom grabbed her! Her shorts and panties flew down her legs and her white, naked ass replaced mine across Mom's lap. I had seen her get spanked when we were kids and misbehaved years before but this time it had a different impact on me. My sister needs to lose about 20 pounds but it sure fleshed out her ass and tits. As she sprawled across Mom's lap with the hairbrush reddening her ass her T-shirt slid up and let her bra covered tits hang out. The bra was a sheer nylon one and I could see her nipples clearly. I stared at my sister's naked ass and tits, both bouncing from Mom's paddling. Her squeals from the spanking, caused my prick to stiffen despite my sore ass. My sister definitely noticed it between the tears as she looked over. Moments later her spanking ended and my mother stood her up and I got a good view of the blonde pubic hair covering her plump pussy. My mother looked at me and nervously told me to cover myself up and we were sent to our rooms like little kids while she went shopping.

I went to my room with a sore butt. The image of my sister's red ass, coupled with her full tits and fur covered pussy dominated my thoughts. My cock was jerking around inside my shorts when I went to my room. As soon as I heard Mom leave my shorts and underwear were around my ankles and I was looking into the mirror at my reddened ass while stroking my stiff cock. Before I reached my peak I heard a knock on the door.

It had to be my sister, no one else was home. I pulled up my pants over my horny cock. I opened the door to my sister's tear stained face. She was holding a bottle of skin cream. "My ass is burning, I'll rub cream into your ass if you'll do it for me". This sounded like a great idea to me and I told her so. I pulled off my T-shirt and kicked off my shorts and underwear. My cock was still rigid and she gave it a long look as I walked over to the bed and lay face down. I spread my thighs so she could see my balls lying there.

She poured the cool cream on my burning ass and slowly started to rub it in. The cream helped cool my ass, but her warm hands rubbing my ass and thighs did nothing for my hot cock. I groaned as she pushed down on my ass, shoving my cock into the bed. When she reached down and stroked my balls I almost lost it. I rolled over with my prick twitching.

"Make me come" I begged. "I'm your sister" was her shocked response. "Please, I can't stand it" and cupped my very full balls. Her gaze was focused on my stiff meat. "How? I've never done it to a boy before" I took her hand and wrapped it around my prick. "Just rub it up and down for a couple of minutes" I croaked. The sight of her erect nipples under her T-shirt and knowing it was my sister's hand jerking me off brought me to a spectacular come in a very short time. She finished milking it out slowly and then took some tissues and cleaned up my cum sputtered chest and stomach.

"Your turn now" I said after I caught my breath and stood up, still naked. Her eyes were glazed as she stared at my softening cock. She slowly removed her T-shirt and bra and dropped her pants and stepped out of them. Like I said, she needed to lose 20 pounds but her tits and hips were full and soft. The only experiences I had were backseat gropings in the dark so I hadn't seen a naked woman up close, much less my sister. Her nipples were huge and stiff, they looked like oversized red erasers pointing out from pale white mounds. She lay face down on the bed where I had just been laying.

Her ass was even redder than mine. The sight started my cock twitching and when she parted her thighs I got to see her soft pussy lips nestled in her pale pubic hair. I took the cream and squirted it onto her ass, it looked like cum. I stroked her ass lightly, gently rubbing the cream in. After a couple of minutes I squirted more on and started to rub harder on her plump cheeks. My circles widened to include the top of her thighs, and then the inside of her thighs. She moaned softly and spread her legs wider giving me a fantastic view of the wetness oozing from her pussy. The next circle took my fingers across the outer lips and she hunched her hips up asking for more. As my finger slowly slid between her lips she closed her legs and sobbed, "No, your my brother, I shouldn't". I shoved my fingers further in and said "turn over, I want to make you come".

She almost broke my arm as she rolled over onto her back and spread her legs. "I need it so badly, watching you get spanked turned me on so much, and then when Mom did me and I saw you staring at me and your cock rising.." I lay down next to her and moved my hand up to that wet, open box. Her hard nippled tits were right by my mouth so I sucked one into my mouth. She jumped, screamed, and came all at the same time. I had learned a few things during my backseat action and after sliding three fingers into her pussy and moving them around I moved to her clit. It was the biggest I'd ever felt! My wet fingers slid back and forth over her clit while she moaned and gasped. The next three orgasms came hard and fast. I was dying to see a pussy up close and her large clit intrigued me. I moved my face between her legs and stared at her snatch. Her clit was just too inviting. I gave it a big french kiss and sucked it into my mouth. She went crazy, her ass was bouncing all over the sheets. I slid two fingers in her pussy and one up her ass while I kept sucking. My cock was rigid and I figured the time was ripe for the first fuck of my life.

I moved to her lips and started to slip it in. "No, that's incest! I won't let you inside me." My best arguements and pleadings were finally sucessful and she spread her legs for me. "I'm still a virgin, don't hurt me". Her words suprised me, the way she humped my fingers I figured she'd gotten laid before this. We were both losing our cherries at the same time! I knelt between her legs, my cock quivering in anticipation. If she hadn't brought me off just before I probably would have come looking at her. I leaned forward and placed the head of my cock at the entrance to her lips and slowly pushed forward. It was so warm and wet. I felt as light resistance and it stopped me for a moment. I pulled back and slammed in as hard as I could. Whatever resisitance that was there parted before my cock and I was in the the hilt. Shelly let out a short squeal and then just lifted her legs to let me continue to thrust. "I don't have any protection, don't come in me". My churning hips didn't really want to hear that, but as my orgasm approached I drew my cock out. I lay on top of her and continued to hump, the friction between my well lubricated cock and her flesh brought me to an exhausting come. As I rolled off her Shelly grabbed my hand and placed it on her cunt. "Make me come more". I summoned up the energy to bring her off three more times before she was sated. I used the tissues to clean up my come and the small trace of blood betwen her legs. "It hardly hurt at all, maybe fingering myself opened me up". I laughed, and for the first time gave her a long tongue kiss. After we were fucking, I figured kissing was OK.

We lay back together, a new feeling between us. We were both still wound up and we talked about how we felt. It turns out that each of us thought getting spanked was a turn on and that we liked each other's bodies. Mom was home! Shelly jumped up and grabbed her clothes and dashed to her room, tits and butt cheeks bouncing. A minute later Mom came up stairs and called us out of our rooms. "You seem to be acting nicer now, just remember, if you get out of line again I am going to spank you the same way!" As she went downstairs my sister and I looked at each other with enigmatic smiles and said "we wouldn't want that to happen".