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I am single, 32 years old with an advanced degree in criminal justice. Paul is married and has 3 lovely teenage daughters. He holds 2 doctorates in computer sciences and many patents. As I said, he is a genius. Paul’s wife, Maria is from Spain and is knockdown gorgeous. She is thin without much of a figure, but absolutely beautiful. Paul is a third generation American whose family came from Mexico, so he has a dark complexion. He daughters are also beautiful. Marla is almost 16. Tall and slender, she participates in sports and has a very nice figure. Her hair hangs down to the middle of her back and she walks erect with her shoulders back. Christina just turned 15. Not as tall as Marla but has a very cute figure. She is a tomboy and loves riding her trail bike in the hills behind her house. She is usually dirty from working in the garden and yard, but when she is cleaned up is just as pretty as her older sister. Then there is June. She is 13 years old going on 15. She can’t wait to grow up. She is the opposite of Christina and can’t stand being dirty. She wants to cook and bake and look her best at all times. She is just starting to fill out and is very pretty, but not much of a figure yet.

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I have spent a lot of time with Paul and his family and had noticed they are very affectionate to each other and also with me. I must admit that the girls have given me an erection on more than one occasion coming through the room in bikini swim suits on the way to the pool in the back of their house. Marla wears this one suit that almost turns transparent when it is wet, but Paul and Maria don’t seem to mind, and of course, I don’t.

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Paul asked me if I could house sit for him for a week while he took his wife to New York City. He had a meeting to attend and she wanted to go along to do some shopping. The girls want to stay here and hang around the house, but Paul felt they needed an adult to stay with them, especially at night. Since I can work from home I agreed to bring my computer over and stay at their house for a week and plans were made.

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I arrived on Sunday afternoon and we all took Paul and Maria to the airport. As we were unloading the luggage at the curbside check in, Paul said, “Bill, just remember this week that it’s okay. We know and approve.”

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“What do you mean, Paul?”

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“After the girls show you the video today, you’ll understand. Both Maria and I approve.” With that they walked away waving to the girls and yelled for them to have fun and to go slow. I thought that was a strange thing to say, but we headed back to their house in the foothills.

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June wanted to fix turkey fajitas for dinner and both the other girls agreed to help. The meal was excellent and I helped clear the dishes putting everything in the dishwasher.

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Marla asked me to come into the den, saying there was something they wanted to show me and their mom and dad agreed I should see it. I was curious and followed them into the huge den. Paul’s den is an engineering marvel. A 102-inch high definition monitor on the wall, surround sound, and things I didn’t even recognize. Marla turned on the TV and one of the boxes set into the wall and told me to relax and enjoy the movie. She said she would be right back. The lights dimmed a little automatically and the screen came on. Paul was sitting on the couch looking at the camera.

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“Hello, Bill. We have made this film just for you so you will be more comfortable with our lifestyle. You are the only person outside of we five to see and hear what is to come and we want you to feel like one of the family. So, sit back and enjoy the video. This is what I meant when I told you that we approve.”

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The camera panned back and Paul was naked, sitting next to Maria and the two older girls. They were all naked. Paul put his arms around his wife and started kissing her while putting his left hand on Maria’s right breast. As he started seducing his wife, Marla stood, moving to the other side of her father. Her breasts were the size of grapefruit and her pubic mound was totally hairless, as were all of them, including Paul. Marla kneeled in front of her father and took him into her mouth as he leaned back, still caressing his wife’s breasts. Christina sat next to her mother and started running her fingers up and down her mother’s leg eventually caressing her labia. Maria also leaned back spreading her legs to give her daughter better access to her.

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I could not believe what I was watching. My partner was making love to his wife while two of his daughters were participating. No, make that all three daughters as June came into the picture and started running her fingers up and down Marla’s ass reaching between her legs and fingering her pussy. As she was doing this, Paul pulled her around to put his hand between her legs. This mini-orgy was in full swing when the picture faded and I noticed for the first time that all three of the girls were standing next to me – naked.

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“Uncle Bill, we wanted you to know what we do because we want to include you in our family sport. Daddy can’t keep up with all four of us and he needs your help. We felt this was the best way to tell you.”

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I could not believe my ears or my eyes. My partner practiced incest? I also realized that I had a hard on that was making a tent of my shorts. Christina stepped up and put her hand directly on my tent pole. “I think he wants to play.”

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“Whoa. I don’t believe I can do this, girls. All of you are under age. Do you realize what could happen if this were to become known? Your mother and father could go to prison and you would become wards of the state.”

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“Who is going to tell? We certainly won’t, because we know the consequences. We also know we enjoy each other and want to enjoy you, too.”

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As Marla was speaking, I realized that Christina had reached up the leg of my shorts and now had my dick in her hand. I also knew that this was going to happen and I was enjoying the moment more than I ever dreamed. I was sitting here arguing with three naked teenaged girls while one of them was playing with my extremely hard dick.

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Christina stepped up and started removing my t-shirt while the other girls started pulling down my shorts and underwear. I did not protest as I lifted my hips to help them remove my shorts. I was now on the couch, naked with three beautiful girls.

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Marla stepped up and placed her breast in my face. I looked at this lovely girl and the nipples protruding like pencil erasers and immediately started licking and sucking since all my resistance was gone. Christina was now sucking my dick into her mouth while June was holding my balls in her small hand. We all lay back onto the couch and Marla straddled my chest moving up so I could reach her shaved pussy. Her labia were swollen with desire and the aroma was intoxicating. She moved up over my shoulders and I spread her labia licking from her very wet hole to her clitoris. It was swollen and protruding as if waiting for my touch. When I liked upward against her clit she let out a loud moan and pushed toward me. I sucked her clit into my mouth spreading the skin tightly with my lips while I started flipping her clit with my tongue. She was starting to move involuntarily and I realized I was also humping into Christina’s mouth.

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I reached down and felt a bare ass next to me and I put my hand between her legs and found her pussy dripping. I started fingering her and working her clit. She yelled that she was going to come and I realized that it was June I had my finger in. I could feel my own orgasm building when Marla climaxed. She yelled and stiffened leaning back but still pushing her pussy into my face. Just as I was about to cum Christina took her mouth off and started pumping my dick with her hand. I shot my load as Christina continued to stroke me saying, “Wow.”

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I thought that the only person who did not reach an orgasm was Christina. We were all lying there on the couch holding each other when I saw that June had been working on Christina while I was fingering her and Christina was working on my dick. We had all cum at about the same time.

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Marla moved off my shoulders and got up. I looked down and Christina was still holding my dick, cum dripping down over her hand. She was smiling.

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“I love doing that to Daddy and seeing him squirt like that. He doesn’t let me do it too often, though, because we all want him to cum inside us.” I still could not believe what I was hearing.

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Marla came over with some tissues and they cleaned up the mess on the leather couch and wiped me off, also. “Uncle Bill, we love you and want you to help Daddy with this. He wants it, Mother wants it, and we want it. I can see you enjoyed it, so please say you will help. All three of us want to share you over the next week. We all like variety in the way we make love, so you will be tired by the time mom and dad get back. He is going to spend a lot of time with mom in New York so he won’t get a lot of rest, but he will get more since we are here. Please help us out.”

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What could I say but okay. I knew it was wrong, but I also knew that I had just spent the best half hour of my life.

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“Do you want to see the video?” Christina asked.

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“Sure.” I was expecting to see the same video again, but when it started it was a video of what we had just done. The den was wired for video and sound and there were three angles from the opposite wall as well as an overhead view. All four pictures were displayed on the screen. As I watched the video Marla used the remote control to select one of the images and it zoomed to full screen. She would move from one picture to the next. I soon had another boner and Christina noticed it. She came over and sat next to me placing my hand between her legs. As I moved my fingers against her she turned and gave me a deep kiss that made my head swim. I had never had a full-grown woman kiss me that passionately and it was wonderful. I reached for her orange-sized breasts and started to caress them. She lay back and I leaned over slowly pushing her down on her back. I was lost in the moment and started kissing my way down to her Venus mound. She pulled up her knees spreading herself wide for me. I licked and kissed her flipping her clit with my tongue. I inserted a finger into her small hole and started working her into frenzy. Marla leaned over next to me and said, “Fuck her, Uncle Bill. She is ready.”

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I rose up and placed the head of my dick at her hole. As I slowly pushed into her I felt someone’s hands on my ass moving down to my balls. I entered Christina and kept pushing until I was all the way into her feeling my balls touch her ass. Her legs wrapped around me and her heels crossed as she pulled me tighter against her. I started stroking in small strokes but was soon pulling almost all the way out and going down hard. Each time she moaned and yelled, “Harder, harder!” She stiffened and pulled her legs down pulling me against her, wrapping her arms around me and squeezing me and she climaxed. I kept stroking in and out, slowing down a little. After a minute or two she had another orgasm and this brought on that deep-down feeling and I could feel my own orgasm building� I tried to pull out but she would not release me.

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“I’m going to cum,” I said.

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“I know, but we’re all on the pill. Don’t stop, because I’m going to cum again, too.”

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I plunged down as hard as I could getting in as deep as possible as I came  It was an orgasm as deep from my body as I had ever experienced. She came before I was finished. I collapsed on top of her panting and sweating. Slowly she released me and I rolled off her onto the floor. Marla and June were watching, smiling.

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June said, “I can hardly wait until it’s my turn.” I knew it would be a while before I had any energy left to do anything like that again. “Maybe tomorrow. I’m totally spent tonight.”

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“We’ll see about that, she said.”