She was bent over the table as I gently lifted her dressing gown onto her arse, exposing the narrow piece of her damp knickers covering her pussy. With one hand on her cheek, I used the other to pull the material to give me access to what was a shaven, swollen, and wet pussy. I couldn’t resist lightly licking just inside her slit from her clit to her arse. I could hear Michelle moaning as she pushed back slightly onto my mouth. My cock was pushing hard to be released from my pants, dampness from my pre-cum making a damp area, wanting to push itself into my sister in laws pussy for the first time. I could feel it throbbing, the blood pulsing along its veins. Next, I placed one, then two fingers inside her. Her pussy felt so soft and tight as I felt her muscles trying to grip my fingers as I pushed them in and out, my tongue running around the entrance to her arse and along each of her pussy lips, tasting her juices as she came. Michelle, my wife’s sister, and her husband, Tim, were visiting us for a few days. Michelle was the older by 5 years, making her the same age as me. Tim, a couple of years older than his wife. Last night, their first night with us, we all had a bit to drink. When I woke up, I went for a shower. Thinking it was my wife, I walked in to find Michelle showering herself. I stood there, shocked, my cock immediately to attention. But Michelle just smiled as she looked down and noticed the effect, she had on me. I turned, embarrassed, and went downstairs. It appeared that my wife and Tim had decided to get up early. They had left us a letter on the kitchen table, saying they had gone to the beach and asking us to meet them there in a few hours. A few minutes later, Michelle came downstairs wearing a dressing gown. She went straight to the sink and made us both a cup of tea. As she turned around to me, both hands full with the cups, her dressing gown opened, revealing most of her tit’s and the white knickers that she was wearing. I wasn’t sure if I had imagined the damp patch showing through her knickers, or if this was from the shower. It never bothered her; even as she sat and passed me my cup, not even pulling her dressing gown together, those lovely tit’s, now with one nipple showing, still on display. Michelle asked me if my wife was still in bed. I said that she wasn’t and passed her the note. After reading it, she asked me if I liked what I had seen. Obviously, I said that I did. I think the hardness of my cock in the shower had confirmed this. And to make things worse, Michelle moved closer, reached down and rubbed my cock through my pants. It started to throb harder I know that she could feel my blood pulsing while her hand was holding it. Saying that we should make the most of them being away as she couldn’t take me to my wife with my cock as hard as it was, Michelle stood and bent over the kitchen table. This was the point where my cock took over from my head, which is where we are now, with my fingers deep inside her. I removed my fingers and with each hand, gently pulled her lips apart, revealing her soft, pink insides and her clit. I took this between my lips and sucked, flicking my tongue around and over it. Michelle pushed back hard onto me as again she came. I couldn’t take it any longer. Standing behind her, I pulled her knickers over her arse and they fell to the floor. I pushed my own pants down so that they joined her knickers. Taking hold of my cock, I aimed it between those pink, shinny lips. With how wet Michelle was and the amount of pre-cum seeping from my cock, I had no problem entering her for the first time. My cock slid fully inside her with ease. I knew I wasn’t going to last long and after a couple of thrusts, I told her that I was going to cum. She told me to fuck her hard until I came inside her. I felt my own juice starting its way from my balls. I held it back as much as possible until I finally erupted inside her; at least 4 or 5 hard spurts. Michelle was screaming as she came too. I finally stopped pumping my cock into her and her head sank to the table. I started to apologise but she told me not to, we had both wanted it to happen. Taking my hand, she took me back up to the shower. We showered together, cleaning each other to make sure there was no evidence of us fucking each other, then went to meet my wife and Tim on the beach. We found them inside a couple of windbreaks in a secluded spot, although there wasn’t many people on the beach. They were laid side by side sunbathing. My wife was on her stomach, her red bikini top unfastened, Tim on his side, talking to her. They had set up a couple of towels the other side of my wife. As we entered, my wife turned over, leaving her bikini top on the ground. I looked across and saw Tim looking at her gorgeous tits. Comparing the two sisters, my wife had the smaller tits, but not by much. I asked where we were expected to change, and my wife said where we were. Michelle didn’t hesitate. Standing, she removed the sun dress she had on, exposing her tits to anyone who was looking. She then removed her knickers, before just replacing them with her white bikini bottoms. I started to hesitate because again, Michelle had the effect of giving me another hard cock. All three were looking at me and I felt embarrassed as I pulled my shorts and pants to the floor; all three looking at my hard, throbbing cock. Tim said something along the lines that Michelle still had it in her to get someone’s cock as hard as mine was without even touching it. Before I had the chance to find my swim shorts, the sisters told me to stay where I was, and my wife stood. Facing Tim, she pushed her bikini bottoms to the sand and asked Tim if she had the same effect on him. Michelle got him to stand and remove his swim shorts. He, too, was rock hard. Michelle stood and removed her bikini bottoms, saying we all may as well be the same. I just could not believe what was happening today. I fuck my sister in law in the morning and in the afternoon, I’m on the beach with Michelle, Tim and my wife, totally nude. We all sat; me facing Michelle and Tim facing my wife. The sisters sat cross-legged, and I couldn’t help more than occasionally looking down at Michelle’s parted lips; especially knowing that only a couple of hours ago my cock was inside it, filling it full of my juices. It was a good job we showered, otherwise my cum would have been leaking from her. Glancing at Tim, I could see him looking at my wife’s pussy the same. Obviously, undressed and sat as we were, the conversation was about sex. This was mainly between the sisters. When they got to cock-sucking techniques, Michelle dared my wife to show her on me. I was too shocked to speak, especially when my wife leaned over and wrapped her hand around my hard cock. Pulling my foreskin down, she slowly sank my cock into her mouth, running her tongue around my shaft, before withdrawing and flicking her tongue around it’s head and along the vein on the underside until she reached by balls. With a moan, I leaned back allowing her more access. It wasn’t long before my wife started sucking harder and faster, aiming to make me cum. I opened my eyes and could see that Michelle was doing the same to Tim. I closed my eyes and thrust my hips upwards and for the second time today, I emptied my balls; this time into my wife’s mouth. I heard Tim moaning and looked to see him erupting into Michelle’s mouth as she took her second load of cum today. The sisters made sure that both our cocks were clean with no sign of cum and asked us to dress. They said that we were going to finish this off at home. We packed up and went home. In the car, I asked my wife what was going on. She just smiled and asked me if I had enjoyed fucking her sister this morning and then refused to say more until we were home. Now I was worried. At home, after we had all showered and changed, Tim and me in our pants and the sisters in bra and knickers, my wife poured us drinks and Michelle started to tell the story. Michelle and Tim were together before my wife and I met. Apparently, the sisters shared everything. Even boyfriends! And when my wife had a boyfriend, he was shared too, with Tim’s consent. But they DID have rules. My wife wasn’t allowed to fuck Tim on her own and same with Michelle with any of my wife’s boyfriends. Tim was happy with this; after all, how many men have the chance of a threesome with a pair of sisters? I asked why I wasn’t invited. My wife said that she didn’t think I would be into this kind of sex life, so I asked why now? Again, my wife said that over the years, they had noticed the way I looked at Michelle’s tits and legs and even took whatever opportunity I could to try and see her in her underwear when we stayed with them. So, when my wife stayed at their house a couple of weeks ago, after the three of them had fucked each other, they put this plan together to see if I would take a chance and fuck Michelle. And while I was at home, fucking Michelle over our kitchen table, Tim was fucking my wife on the beach surrounded by the windbreakers. This was the only time Michelle had not been there when he fucked my wife. Listening to this, my cock was hard and continued to throb and while my wife was talking, Michelle had removed Tim’s pants and was slowly wanking his hard cock but never taking her eyes from me. I watched as she held his cock and gently rubbed her thumb around and over it’s bulbous head, moving his pre-cum around. I felt my wife’s hand move inside my pants and pull my cock free. She seemed to be wanking my cock in time with her sister wanking Tim’s. I quickly glanced at her and, like her sister, her eyes were on the opposite man. Michelle stood and moved over to the other side of me. While my wife held my hard cock in her hand, Michelle bent over and took me into her mouth. Now Tim was watching us, slowly wanking himself. My wife also leaned over, her tongue licking my balls while Michelle’s tongue ran up and down my rigid cock. They then placed their lips either side of my cock and moved their heads in opposite directions. I had been faithful to my wife for the past 5 years since we married and was just now finding out what I had been missing. Tim stood and moved over and pulled first my wife and them Michelle onto their knees next to each other. They never stopped sucking and wanking my cock. He reached over and removed each of their bras. His hands either side of my wife, he slowly moved them downwards until he could hold either side of her knickers. Pulling them further, he removed them over her arse. I thought he was going to fuck her, but he didn’t. Pulling her cheeks apart, he bent further forward and from my wife’s sudden intake of breath, he was using his mouth and tongue on her pussy. After a few minutes and my wife having an orgasm, he repeated the same with Michelle. Once Michelle had also cum, he pulled her over to the settee with him. Laying on his back, Michelle placed herself in a 69 so they could suck and lick each other. My wife stood and turned her back towards me. Spreading her legs over me, she held my cock while she lowered herself onto me. I felt the warmth of the insides of her pussy wrap itself around my cock as I slid deeper. When my cock was fully inside her, she leaned back and raised her legs to place her feet on my thighs. This gave her control to fuck me as quick and hard as she wanted. Placing my hands under her arse, I steadied her and she began moving up and down on my rigid cock. It’s been a few years since I had cum more than twice in one day, but here I was, fucking for the third time in just over eight hours. I watched Michelle and Tim over my wife’s shoulder. Michelle was once again watching me as my wife fucked me. My wife moved up and down faster until she finally sat fully on my cock and I felt the warmth of her juices as they flowed around my cock. My wife placed her feet on the floor and slowly raised herself, a feeling of disappointment as my cock came free of her pussy. Michelle also stood and the sister swapped places. Michelle stood to one side as my wife got into a 69 over her husband. For the first time, I watched as my wife took another man’s cock inside her mouth. Michelle spread herself over my cock in the same position as my wife. For the second time today, my cock slid inside her easily, the past 5 minutes as her husband sucked and licked her pussy assisting. Although my cock was inside my wife’s sister’s pussy and I was fucking her in front of my wife, I couldn’t take my eyes of Tim’s cock starting to thrust into my wife’s mouth. My wife looked up and smiled at me. Standing up, she had Tim sit as she lowered herself onto his cock in exactly the same position I had just fucked her. Today was full of sexual firsts for me. I had fucked my wife’s sister and cum inside her pussy; I had cum inside my wife’s mouth as her sister had sucked her husband’s cock dry in front of me; I had just seen another cock inside my wife’s mouth as another man was licking and sucking her pussy. And now, she was being fucked in front of me while I was fucking her sister. I couldn’t hold it any longer. I pumped my juice deep into Michelle for the second time today. Seeing me cum inside her sister, my wife came while Tim was fucking her. Michelle continued to slowly rise and lower over my still semi hard cock and I could feel my cum seeping out between her lips and my cock. I watched as my wife lifted from Tim’s cock. She came over and knelt in front of me and Michelle. Her hand cupped my balls as I felt her lips begin to lick my juice from around my cock and Michelle’s pussy. The familiar throbbing of my cock started again. My cock started to harden as I watched Tim, hard cock in hand, move to the side of his wife, aiming his cock at her. Michelle took him in her mouth as she was been fucked by me, my wife’s tongue also licking her pussy as my cock thrust in and out of her. After a few minutes, Tim moved my wife back towards the settee and had her rest her head on the seat, her arse in the air, still facing me and Michelle. He spread his legs over her and aimed his cock down towards her pussy. I could see how swollen they were, the light glistening on the pinkness, making her lips shinny. I watched as the head of his cock parted my wife’s lips, and then he slowly pushed into her, until his balls were resting on her clit. Once fully inside, he began hammering into her, making her scream. He managed to keep this up for nearly 5 minutes, my wife sounding like she was in constant orgasm, until he threw his head back as he pumped his juice into my wife. When Tim pulled himself free, Michelle leaned around and told me to fuck my wife. I moved over and took Tim’s place. As I pushed my cock inside her, it was hotter than usual, her pussy lubricated by Tim’s cum. He had emptied so much inside her that my cock started pushing his out. My cock was covered in a mixture of his and my wife’s cum, covered in white froth. While I fucked my wife, her brother in law was sat next to her. She moved her head over and cleaned his cock with her mouth. When she had finished, Michelle took her place. I had been keeping a steady pace for nearly 10 minutes and Michelle had brought Tim’s cock back to full hardness. We had both sisters lay on the floor side by side, legs wide, their pussies waiting for our cocks. Tim and I took turns fucking each other’s wives for the next half hour until we both emptied our juices again into our own wives’ pussies. We all lay on the floor, exhausted. Both Tim and I were emptied for now, the sisters full of our cum. I don’t know how we decided, but we seemed to agree that my wife would spend the night in our bed with Tim, and Michelle and I would have the spare room. How I managed, I don’t know, but I came twice more inside Michelle during the night, once in her pussy and once in her mouth. At times, we could hear Tim and my wife fucking in the other bedroom. It sounded as though Tim fucked her more than I did his wife and she confirmed this to me when we spoke about it when Michelle and Tim left. But the weekend didn’t finish there. We returned to the same spot at the beach the next day. Set up the windbreakers again and for an hour or two, we fucked and sucked the sisters in public. Before they left later that evening, we ended the weekend by Tim and I fucking Michelle then my wife, each of the sisters taking turns being fucked by two cocks. Once one of the sisters came, they would swap, which meant I fucked both pussies and mouths, before they lay on their backs side by side and I wanked until I came over Michelle’s face and tit’s, Tim doing the same with my wife. We tried to get the girls to try DP, but they refused; however, they did say that it may happen one day. And it did.