My wife, Gia, is five feet, one inch tall, under a hundred pounds -- a tiny lady. She is a beautiful, red-haired, green-eyed, sexy, young woman. She has great legs, a tight, round ass, and the biggest tits imaginable on such a petite frame. They don't sag and look positively mouthwatering without a bra. I love Gia very much and respect her as a person, but I have to admit that what first caught my eye were these huge, firm 34-D's on such a tiny girl. We've been married a little over five years, and have had a great marriage -- until now. Gia has a much older sister, Zuby, who looks completely different from Gia. Zuby is tall and skinny (not thin -- skinny), probably 5'10" or 5'11", with no ass or tits. Anyway, Zuby is a very successful realtor living in San Diego, and we hadn't seen her since our wedding day. We exchanged Christmas cards and photos, and the sisters called each other, but that was it, until last month. I don't get to travel as often as I used to (damned FAX machines!), so when I was assigned a trip to San Diego, I called Gia right away and suggested she join me so she could visit her sister. Gia wanted to surprise Zuby so we didn't announce our arrival, and instead, we just drove to her house, walked up to the front door, and rang the bell. There was no answer. Gia suggested we look around back in case Zuby was in the pool or gardening. As we approached the high privacy fence around the pool area, we heard voices. Both Gia and I pushed our faces close to the fence and peeked between the redwood slats. I had never seen anything like it in my life! Zuby was face down on several towels, on her knees with her ass high in the air, while this tan, young guy was ramming in and out of her cunt with the biggest cock I have ever seen on a man -- and it wasn't just long, it was thick, too. And that's when all my troubles began! Watching Gia's reaction to the sight before us, I could see that she was completely turned-on. A virgin when we married, she had often told me that my normal six-inch cock was perfect and that even it stretched her tight cunt at times. I'm sure she had never even imagined a cock the size of the one plowing into her sister. I have seen more than a few x-rated videos, and the cock I was watching was bigger than any I had ever seen, even on the famous professional stars. I felt major male insecurities at that moment. I saw that this wasn't the right time to disturb Zuby and her friend and I pulled Gia away from the fence. We returned to the rental car and waited about an hour. Later, when Zuby opened the door to our knock, the two sisters had a happy, tear-filled reunion and we met Salman, the guy now living with Zuby. At 20 years old, Salman was 21 years Zuby's junior, and was almost five years younger than Gia and I. He was muscle- beefy, tanned, and blonde -- the perfect California stud. Over dinner, we found out that Salman had been Zuby's pool maintenance boy before he moved in with her. Zuby insisted that Gia and I stay with her and Salman, so after dinner we collected our things from the hotel and drove back out to Zuby's house. There was a note on our bed asking us to join them out at the pool. It was a beautiful night and the pool area was beautifully lit. Zuby was on a chaise, her skinny body wrapped in two thin strips of red cloth passing for a bikini. Salman was in long white swim trunks, and the long, thick outline of his soft cock was clearly visible, and not missed by Gia's blatant stare. We had had drinks before dinner and almost finished three bottles of wine with dinner, and now, Salman was keeping our glasses filled with some sweet, tropical concoction and we were not feeling any pain. Gia, giggling the whole time, told Zuby what we had seen through the fence when we had arrived that afternoon. Zuby went on to tell us that the first time Salman screwed her, it had been fast and furious in the dark, and she hadn't seen how big his cock was until it was all over. She laughed loudly and said, "I couldn't believe I had really taken in all that pink meat, but I had, and I wanted it again! They say it ain't the meat but the motion, little Susie, but don't believe them!" Then she stood and said that we were all family and didn't need suits in her pool. She dropped the two pieces of her suit and jumped into the pool. Salman stood close to our chairs and slowly dropped his shorts. Gia was all eyes as Salman hesitated long enough to give her a good look at his merchandise and then he jumped into the pool. I could hear Gia's raspy breathing as she looked at me and asked, "Well, Shahzad, should we?" I didn't know what to say. Skinny-dipping was something sexy that we had never tried, but I was beginning to feel uncomfortable with the sexual tension obviously growing between Salman and my wife. Just then, Gia stood up, peeled her modest one-piece bathing suit off, and dove into the water. She was barely wet when Salman swam right over to her and put his arms around her from behind and filled his hands with my wife's tits! Gia's hands disappeared below the water and I watched as Salman's smile got even bigger. "He's crazy over little Susie's big tits," said Zuby as she sat down on the chaise with me. "It's the only thing he's talked about since you two got here. And if you ask me, she's crazy for his big cock." I stared in disbelief as Gia turned to face Salman and kissed him passionately. "This can't be happening," I said. "We've never fooled around before." "Relax, Shahzad, what's a harmless little fling? Especially when you're watching? You're in Southern California, now. Don't spoil little Susie's fun!" That didn't help matters as I watched Gia and Salman climb out of the pool and lay on a towel. Gia had the head of Salman's monstrous, erect cock in her mouth, sucking it with all her might, as Salman noisily slurped at my wife's cunt. Then I felt a hand on my cock. It was Zuby and I was surprised to notice that my dick was as hard as a rock. She bent over and sucked me into her mouth as I continued to watch my wife's slutty performance. After a few more minutes of sixty-nining, Salman got up and collected cushions off the lawn furniture, which he threw on the deck, and then rolled Gia onto her back on them. He then knelt right up against my wife's ass and pulled and hoisted her buttocks up into the air, sliding the cushions around, under her. ..... I knew what was coming next, and as much as I wanted to stop it, I couldn't. And it wasn't the so-so blow job that Zuby was giving me that held me back. I didn't want to cause a scene, and, most of all, I was afraid Gia wouldn't stop if I asked her to. By now, Gia's legs were wide-spread and Salman was in position with his monster-cock poised at the entrance to my wife's obviously wet cunt. Zuby looked up from my prick and said, "He measures just over fourteen inches long and just over seven inches around. Magnificent, isn't it? Don't worry about little Susie, he's good at what he does, and I'm betting he can bury it to his balls!" I gasped for my wife, watching Salman slowly work his giant rod into her stretched-open pussy. Gia was moaning and grunting, pounding on Salman's back with her tiny hands. Steady, steady, Salman kept up his invasion of her tiny cunt. ..... I was waiting for Gia to yell "stop!" or scream in pain, but she didn't. Sooner than I thought possible, it looked like Salman had his entire length buried in my wife. She had taken it all! They laid still together for a few minutes, then after a few more moments of slow thrusting, Salman began to pound that big dick in and out of my wife's cunt with all of his energy. He lifted his hips away, until he was almost out, and then slammed back down into her. I could hear her wet cunt slurping loudly as it succumbed to Salman's onslaught. Then, his tempo and power increased even more and Gia went completely wild. She was delirious with lust and passion, scraping his back with her nails, pulling his ass deeper between her legs. She was fucking him like some animal locked in mortal combat. And, then, they started to come. It wasn't slow or gentle. It was an explosion! Gia came with a scream and almost-pained moans and gasps. Again and again, she clenched her arms and legs around Salman. Finally, with a deep grunt, Salman tightened his asscheeks and curled his toes as he shot his cum into my wife's cunt. I filled Zuby's mouth with my cum as I watched Salman fill my wife's pussy with his. They laid together a few moments, catching their breathe, and then Salman began sliding his cock out of Gia's cunt. "No!" she whimpered. He removed his dick and Gia's cunt lips slowly closed. I watched a huge wad of Salman's slimy cum flow out of her pussy and run down between her ass cheeks to the cushions below her. Zuby stood over my wife and laughed, "He's something, isn't he, little sister?" "I... I never... ohh..." Gia gasped in a soft voice. "Well, give him five minutes and a soft bed, and you will think you've died and gone to heaven. How about us girls switch bedrooms for the night? Shahzad? Is that alright with you?" I wanted to yell "No! Of course it's not alright!" but I didn't. Something in Gia's eyes, the way they were almost pleading with me, stopped me from saying what I wanted to say. Instead, I nodded a small nod, "Hey! It's Southern California, right?" "That's right, Shahzad," said Zuby, "I don't have to ask Salman if he wants to switch. The way he's looking at your big tits, little Susie, I know you're in for a long night!" And she was. Zuby fell asleep soon after I finished fucking her bony frame, but I laid awake in the bed listening to Salman and my wife having the time of their lives. They moaned and groaned and grunted and sighed and screamed in pleasure, time after time after time. The only actual words I heard all night was Gia pleading with Salman, "Oh, no, not my ass! Please, not there! Ow! Ow! Oh! Oh! Oh, yes! Shove it all the way in, you bastard!" It was disgusting, but it was only just beginning. On Monday, I had to begin my sales calls for the week and Zuby had to open her office, and that left Salman and Gia home alone to frolic at the pool, all day, every day. And frolic they did. I would come home to find them fucking or sucking or sleeping by the pool, Gia's nude body covered with love bite marks and dried cum. On Tuesday, I bent to kiss Gia. She woke up and smiled at me and said, "Today, Salman fisted me! We're going to have to try that when we get home!" "Sure," I said, wondering if Salman was stretching my wife's cunt beyond recovery. Saturday finally arrived and Gia put clothes on for the first time all week. As I put our luggage in the trunk and thanked Zuby, Gia was in the foyer, her skirt up at her waist and leaning on the stairs, taking Salman's monster up her cunt one more time for a good-bye fuck. Gia slept all the way home on the plane. Finally home and in bed together, Gia kissed me deeply. "Thank you for this week, Shahzad." "You seemed happy. What was I going to say?" "You could have said `no.'" "Would it have stopped you, Gia?" "I don't know. I'm just grateful you didn't say it." "He was good." It was a statement. "Shahzad, I don't know how to tell you this without hurting you, but this last week was the best sex of my life. I have never been fucked like that before, and now I'm worried I'll never be fucked like that, again." "We could try." Thirty minutes later we rolled apart. I knew Gia had had several orgasms, but I also knew something else. "It wasn't the same, was it, Gia?" "Maybe it was just too soon. Or, maybe-" "Or maybe it will never be the same, with me, Gia. You loved his big cock." A tear squeezed out of her eye and she bit her lip as she nodded a tight, quick nod. "But, I love you, Shahzad!" "I know, Gia." The next morning, I awoke with an idea. "I guess we can invite your sister and Salman in for a visit, Gia." "Sure, but Zuby said she's never been busier, and never takes any time off." "Do you have any ideas?" "Well... I've been thinking. Maybe there's a man on this side of the country that would like to fool around." ..... Maybe you've seen Gia's ad in the free paper's classifieds. It's been very successful, and has provided a steady stream of well-endowed men knocking on our door and fucking my wife senseless.