This story is based on a fantasy I have had for the last couple of years.



I never considered my sister, Andrea, a sexual object until one day three years ago my sister was changing at my parent's house getting ready for of all things a Christening. My sister screamed something out while I was in the kitchen. I walked into the living room to see what she wanted. My sister was bottomless with her dense, dark bush on full display. I stared at her for several seconds wishing I had put my contacts in this morning. She still had her shirt on covering her large breast but her stomach, thighs, legs and bush were beautifully uncovered. I remember thinking my sister has a much better body than I thought and she colors her hair. My sister didn't scream and didn't hurriedly cover herself. She just stood there. After a few seconds I just walked back into the kitchen. But my fantasy life about her was now fueled. I now realize she must have screamed out "Don't come out here I'm getting changed". OOOps. I fantasized about her constantly after that. I dreamed that I went over to her that day and just started eating her pussy. That I pushed her back onto the couch and started fucking her. I found a girl in an old men's magazine that looked like her and would jerk off fantasizing that it was my sister and we were fucking like crazy.



After that day are lives went on as normal and nothing was ever said of the incident by either one of us. But that was the first time I had seen her that naked since we were kids and it had changed the way I looked at her. At the pool I watched my sister prance around in a full piece bathing suit wishing she would wear a bikini and hoping for an accidental slip of the suit coming out of the water or when her child pulled on it. I began slapping her butt. Just a soft spank every now and again. Never, ever a caress. Just a soft slap on the butt. She never protested so once nearly every visit I'd give her butt a little pat. I never crossed the line.



I knew my fantasy was morally wrong. I considered myself a moral person and this fantasy was starting to trouble me deeply. Besides, how do you seduce your sister? What if you failed, it would destroy your relationship with her and possibly your entire family. Not worth it, but I tried to put a general vibe out there that if she wanted to I'd fuck her silly.



Which led to the butt slap, I had trouble calling it a spank, too sexual, and just more sexual talk between us about other people. I would say dumb things like "I'd fuck her" about other women and she would laugh. I'd ask questions about women's sexual feeling about issues or situations, basically disguised ways to bring up sex and possibly her sex life. Then she started making jokes about sex and men. I never thought beyond us having sex. To me it was never about having an ongoing romantic relationship with my sister. I thought here is the woman my age that I am closest to in the whole world and I wonder what it be like to fuck her. If we both are single why can't we fuck? O' yeah it might destroy my entire family if the wrong emotions got involved.



Three years later my sister was 34 and had just gone through a nasty divorce. She had one child and for the first time her ex husband wanted to spend quality time with their child. This left her with lots of free time on every other weekend. When the opportunity came to go to her friend's wedding several states away she jumped at the chance. By now I was dating my sister's best friend, Erin. Erin had been divorced twice but had no children.



My sister's and Erin's friendship drifted depending on their marital status at the time. Erin was jealous when Andrea was happily married. Erin was partying looking for husband #2 when Andrea was having a baby making both of them jealous of the others life. But at this time both were freshly divorced and could relate to each other's problems.



My sister and Erin were both 2 years older than me. I had always had a crush on Erin but she was always in a relationship or married. I could tell liked me because towards the tail end of her relationships she would always flirt with me. So I wasn't surprised when Erin was once again single she asked my sister to set her up with me. We had been going out for about 4 months at this time.



My sister and Erin looked completely different. My sister was blond about 5'6 with large D cup breast and about 125 pounds. Erin was a brunette tall nearly 5'11 with small B cup tits and model like thin. Erin looked Irish while Andrea, my sister, looked German both their heritages.



Since the wedding was for Becky, both my sister's and Erin's friend we agreed to all go together. Now we all had jobs and made good money but for some reason the conversation came up should we get just one room. I said we were all going to pass out after the wedding and take off the next day early in the morning. The room was for sleeping for a couple of hours. No more. My sister was fine with sharing a room and so was Erin. So we made reservations for 1 room two beds.



Now I had a plan. I knew my sister was never, ever going to fuck me. It just is not going to happen. She is way too moral. Though age and experience had loosened her up, she was just not going to come on to me. And I would never cross that line. But what was the next best thing to fucking your sister. No not your cousin. God, your sick like me. No. Fucking your girlfriend, your sister's best friend while your sister is sleeping in the next bed only a few feet away.



This I could possibly make happen. When we reserved a single room for the three of us this plan had not even slightly entered my mind. But when I thought about my sister, my girlfriend and I sharing a room together my mind went into overdrive. The question was would my sister walk out of the room in a huff if she woke up to the sounds of Erin and me going at it the dark.



Would she yell at us to stop. I considered my sister and the situation. She would be drinking, probably heavily, I would see to that. She probably hasn't had sex in a while. She'd be horny. I didn't think if she woke up to the sounds of us having sex that my sister would want to acknowledge being awake. She might cover her head with a pillow. Turn her back to us. Listen or possibly watch? But I could not see her acknowledging her brother was fucking her friend in the bed next to her by saying something or getting up and leaving. It would be much more discreet and less awkward to feign sleep.



My girlfriend, Erin was a horny woman. I liked that about her. We were still in the stage of the relationship that we had sex almost every time we saw each other. If we didn't we were ripping each other's clothes off next time we met. So about four days before the trip on our date I made an excuse that I had to go home early. No sex. I knew she had plans with my sister the next day. After that I made up excuses with talk about how bad I wanted her but just couldn't get there.



She told me to come pick her up for our trip about an hour earlier then we had to leave. She went on about how we hadn't been together for days and now the weekend was going to be shot. Basically, she wanted or needed to be fucked before we left for the trip. The plan was working. My plan was working on me as well. I told my sister I was meeting Erin at 9:00 and knowing my sister she immediately volunteered to meet us then. Erin was not a happy person when she opened the door to my sister's smiling face. As we walked to car I whispered to Erin that my sister just showed up and there was nothing I could do.



On the drive down Erin and Andrea talked up a storm as if everything was normal which it was. I would rub Erin's leg every once and a while. Going up a little short of her upper thighs. At one point she leaned over to me and whispered, "Stop that, your making me wet." Erin was getting wet from me rubbing her leg as she talked to my sister. Okay this trip is a success already. My cock stiffened immediately as she gave me a light kiss on the cheek and moved away.



After a few seconds I moved my hand back to her leg, she looked at me, like you are so bad, then pushed my hand away as she made a gesture to my sister and resumed their conversation. For her getting wet was about no sex for several days with me and the feeling of contact between us. I didn't try touching her leg again not wanting to be obvious that getting her off around my sister was a turn on for me.



At the wedding everyone kissed and hugged their friend getting married who they hadn't seen in a while. I could tell they were faking it to some degree because a bit of bitterness had set in post divorce. They both laughed hysterically when I joked, "No more than 3 years is this going to last". Seconds later they were protesting that Becky would be married forever but they didn't believe it. I think they were almost rooting against it. Chicks. I barely knew their friend but she seemed nice and having never been married, I am only slightly cynical. I was hoping for the best.



The reception featured dancing, drinking and the usual lame speeches. My sister had changed at our hotel room into a short black dress. I fantasized about lifting up the hem of her dress, ripping off her underwear and fucking her doggy style. Erin was dressed in red form fitting outfit and looked fine. But my sister looked hotter and more fuckable with her larger breast pushing at the fabric. Though Erin had the finest ass. I kept my sister and Erin content with drinks of vodka and cranberry juice. I didn't want them to get passed out drunk either though.



I usually avoid dancing like the plague but I got out on the dance floor. I grinded up against Erin from behind on numerous occasions and grabbed some butt. I avoided being alone with her because I could tell she wanted to leave for the hotel room. Luckily the reception was not at our hotel. I danced with my sister during a couple of songs and rubbed my hand along her back. Feeling her bra strap and the small of her back. The three of us danced together to YMCA and several other lame songs.



My sister started to get friendly talking with several of the guys at wedding and I started to worry she was going to be hooking up. After all we were several states away from home who would know but her brother and friend. But luckily she didn't and we all headed back to the hotel late at night, slightly drunk. I needed a little bit of alcohol to push me to go ahead with the plan.



When we reached the hotel room my first thought was what if the girls decide to sleep in the same bed. Leaving me alone. Erin might not trust herself in the bed alone with me at this point. Andrea might feel uncomfortable about her brother and friend sleeping together. The women might think it might be easier and less weird for them to share the bed. Then I noticed that the beds though not small would fit 2 people with only a little contact. The two people sleeping together would be crushed up against one another. Spooning pretty much. Erin would be sleeping with me.



I looked to see how far the beds were apart from each other. A night table separated the two beds with a phone and digital clock on top of the table. Two, no more than 3 feet separated the beds. Perfect. Enough distance so that we didn't feel like we were right on top of each other destroying any sense of intimacy but still close enough that might sister would practically be part of the action.



I quickly stripped off my shirt and tie. "I'm exhausted" I pronounced and pulled off my shoes, pants and socks. The women were talking about how beautiful the wedding was and how my sister thought the groomsmen were cute but goofy. Erin and my sister had paused to look at me as I slide my pants off. I could tell they were thinking how much clothes is he taking off. Stripped down to my boxer shorts I walked to the bathroom and brushed my teethe. I felt comfortable. My sister had seen me in my boxers hundreds of times and Erin, well, she had seen me naked. I was in good shape so I figured I might as well advertise it.



I could hear them talking about the wedding and I suddenly thought how much does Erin talk about our sex life with my sister. They are best friends after all. I started to get stiff at thought of my sister hearing about me fucking her friend. I tried to push those thoughts away not wanting to walk out of the bathroom with wood.



I walked back to the bed and jumped onto it. Pulled the covers and got in. Erin was next to go to the bathroom as Andrea pulled her clothes out of the suitcase. When Erin, my girlfriend, strutted out of the bathroom she was wearing a loose fitting t-shirt and a pair of shorts. This was her usual sleeping attire except she usually wore a pair of panties with that T-shirt at least until I took them off. The shorts were definitely for my sister's benefit. Erin moved over to my bed and I slid over as she got settled. I wrapped an arm around her and gave her a peck on the cheek.



Next it was my sister's turn to change. She walked out a few minutes later wearing a silk pajama bottom and t-shirt. The t-shirt was loose but still emphasized her huge breast which had obviously been unleashed from her black bra which was carrying in her hand. She walked over and turned off the lights. When she turned around I could tell she was wearing a pair of panties underneath the silk bottoms.



I thought back to the time my sister and I were teenagers and early twenties living at home. At nighttime my sister would wear a pair of panties and t-shirt to bed. She would lie on the floor and watch TV or sit on the couch and the t-shirt would rid up and I could see her panties as plain as day. I never gave a second thought about it. It was no big deal. Not of sexual interest at all. My sister would ask me to zip up her dress in the back and I would see her bra and panties. I barely noticed. Now I was getting wood from watching her carry her bra wearing a t-shirt and pajama bottoms with panties underneath. Strange, I thought. I am crazy.



Erin rubbed my arm for a while but I didn't respond other than give her a peck on the cheek. Andrea jumped into the other bed with the lights off and the women started to drift off to sleep.



I pretended to start to sleep. But I was really letting my sister and Erin fall a sleep. I opened my eyes after a while trying to see how well I could see in the dark. Once my eyes had adjusted I could see relatively well from the light from the clock radio and from the hallway coming underneath the door. I had already decided to let some time pass and let the girls fall asleep.



My sister needed to be asleep or Erin would never let me fool around with her. I wanted to wait a couple of hours but I didn't want to fall a sleep. I could not see my sister because Erin was sleeping on that side of the bed and the clock was slightly misaligned towards my sister's side of the room. I had put my watch on the ground near my side of the bed so I could see the time. Unusually smart for me. I moved my arm from around Erin and she preceded to snuggle against me. It was very comfortable and though on edge about my plan the warmth and alcohol I had drank helped me to fall asleep.



I woke up with a start it took me a second to realize where I was and who was in the room. After a couple of seconds, I gently moved towards the edge of the bed and picked up my watch. It was 2:11 AM. The wedding had ended at 11:00 and we settled in the room at 12:00. So I had been sleeping for about two hours. I could hear Erin breathing deeply with each breathe. She was sleeping on her side facing away from me towards my sister. I raised my self up slightly and I could see my sister sleeping on her back with the covers over her as she lightly snored.



I slipped over to Erin and nestled into her back with my body pressing against her and my face breathing in her perfumed hair. I slowly dropped my hand onto her stomach as she continued to breathe sleepily. I rubbed slowly with the lightest of touches against her shirt. My hand gradually moved finding the bottom of my girlfriend's T-shirt touching her flesh underneath for the first times in days. Her soft, toned flesh felt warm and inviting as my hand traveled to just below her breast. Rubbing and softly petting her back down to line of her shorts my hand once again lightly pressed up against her stomach to right below her breast and beyond.



My hand cupped her left breast. I am always amazed at the softness and silkiness of women's tits. I slowly sensually massaged the entire breast and then took my fingers and squeezed her nipple which was puffily sticking out. I ran my hands over her breast again cupping and messaging it and then moved my hand to her right breast. A little more roughly I squeezed her breast and nipple. How I yearned to sucking on them. I was tempted to pull her on to her back but I wanted to wake her more slowly and gently but desire was building in my loins.



I pushed my rising cock into Erin's ass cheeks once and then again. I stopped and slide my hand down from her breast and onto stomach. My hand found the line of her shorts and slide underneath them and found her panties. I wanted to put my hand inside her panties but willed myself to be patient. I pushed my cock snugly against her ass. My hand felt her silk panties that she had worn to the wedding. How I love silk. I pressed my fingers strongly against her as I felt light hair and her pubic mound rise against my greedy little fingers.



Agonizingly slowly my fingers made there way to between her legs. I started gently rubbing. Trying to find her clitoris hidden beneath the folds of flesh and silk. I would alternately rubbed her entire mound and then the area of her clitoris. Her deep breathing suddenly stopped and her body tightened. She was awake. I immediately rubbed her more deeply and kissed her neck and ear, put my tongue in her ear. Her favorite when playing with her pussy. She moaned softly "ahh, ahh"



Erin turned her head back towards me, her breathing had turned from sleepy to passionate gasps. "What are you doing," her voice deep and sensual.



I whispered into her ear "Don't you like it.



"Ahh, your sister is right over there," she raised her hand on top of my arm, not pushing me away but pressing against it just above her public mound.



"She's asleep," I replied as I continued gliding my fingers against her pussy. Her wetness was leaking through the fabric and I could feel her opening was begging for my attention as she pushed against my hand. I moved my hand up and slide it underneath her panties through her sparse pubic hairs until I could feel her wetness. My hand glided back and forth moistening my fingers.



I searched and found her clit and rubbed a light circle around it as she arched her back and tried to control herself but several moans escaped her lips. My fingers slowly moved lower and slipped through her lips inside her vagina. I pressed against her walls and than pulled them back towards her opening and than forcefully back in as I began to finger fuck her. She made a small hip movement towards my fingers with each thrust of my fingers.



I whispered into her hair, " I want you so bad. I want to make love to you." Than more urgently, " Please fuck me, baby. I need to be inside you."



She turned her head back to me and quietly said as she gasped for breathe, "We can't. Your sister." I quickly thrusted my fingers powerfully against her several times in quick secession. "Ahh, stop we can't." She started to reach her hand down to my fingers. I pulled my fingers out of her hole and reached for her clit and gently began rubbing her sex.



" You are so awful," she moaned as she turned onto her back. I leaned over and kissed her lips as Erin reached for my cock and began rubbing me. "We can't your sister is right there." I didn't want to come so I moved my body towards her and kissed her passionately forcing her to move her hand. I moved my hand out of her panties and along with my now freed right hand grabbed her shorts and quickly pulled them down to her panties. I then put my fingertips into her silk bottoms and pulled them forcefully lower. Her panties and shorts grabbed at her butt. I thought they might ripped and torn off, but then she moved and as she shifted her weight I was able to lower them past her butt and pussy and then her thighs.

