My wife Laura and I were an outgoing couple. We have been married for a little over 3 years, and are very happy with each other. My wife is Hispanic, 5’2’’, light brown skin, and 37D cups. She is very friendly, and can be even flirty at times. One week not too long ago, it was a hot and humid summer day, and we decided to have another couple over for the evening for drinks and to relax in the hot tub. The couple were some good friends of ours, Tom and Katie. Tom was a fitness nut that was healthy, and toned, and Katie was a knockout brunette with medium breasts and a tight stomach that she loved to show off. At 8pm, they arrived, and then went to change into our swimsuits. Laura and I had already discussed being a little more adventurous tonight beginning with what we were wearing. I chose a tight fitting speedo for me, and Laura chose a gold shiny bikini that was tight, and accentuated all the right areas. Tom chose a normal pair of swim trunks, and Katie surprised me with a mirror image of Laura, just in a metallic blue color that gave me an instant boner. I already had the hot tub ready, and we quickly poured drinks and headed outside. We all got in, and Laura sat on the outside, then Katie, and finally Tom, and I sat next to Laura. We started talking about how we met, and we found that we had a lot in common. We shared similar interests, and the Laura and Katie started talking like they had known each other for a long time! Tom and I started talking, and soon the drinks caught up with us and we all became a little flirty. Tom and I started bragging about our wives, and about how beautiful and sexy they both were. I suggested that he and I trade places and get to know each other’s wives better, and he agreed. He and I quickly traded places, him sitting next to Laura, and me next to Katie. I could hear Tom giving compliments to Laura, and heard her get flushed with happiness and excitement. I in turn complimented Katie on her physical features, and told her she must work out to keep in such good shape. Out of the corner of my eye, I watched Tom’s hand move to Laura’s thigh, and come to rest on her shiny bikini clad pussy. Laura in turn, put her hand on his ever growing tent that was forming in his speedo, and things started to get more intense. Tom and I looked at each other, and gave a small nod, as if to say “everything is fair game”. I started feeling Katie up, running my hands over her perfect shiny bikini breasts, feeling her softness in the bikini, and moving my fingers around her nipples, causing them to stiffen in the bikini. She started breathing heavy with excitement, and reached down and pulled my cock free from my speedos. She started stroking my cock wither soft hand, and soon it was rock hard. I quickly used both hands to pull down her bikini, and freed her breasts, shiny and wet from the warm water. She guided my hands to massage and rub her pussy over her shiny bikini bottoms, and soon she slid my fingers inside her bikini and into her pussy. She gave a sharp gasp of pleasure as I started fingering her, in and out, and in and out. She continued to stroke my cock, and then leaned over put my cock in her mouth, and started giving me a blowjob. I looked over to see what our partners were doing. They had been busy too! Tom was running his hands over Laura’s shiny bikini breasts, and shortly after, lowered her bikini so her breasts were freed. Laura then got on her knees and pulled his speedos down and started sucking Tom’s cock. He got hard quickly of course, because I knew that Laura could give amazing blowjobs. He then spun her around, and was feeling her bikini clad pussy from behind. Laura got so excited, and was moaning like crazy! Tom, then moved her bikini panties to the side, and sat her down on his cock, and Laura gave a squeal of excitement. It was so sexy to watch my wife bounce up and down on his cock. I in turn, got up, and bent Katie over doggy style, quickly moved her bikini to the side, and plunged my cock inside of her tight, wet, silky pussy. Both of the girls were moaning from pleasure, and I had never been so more turned on. It didn’t take long for Katie and I to climax, and as I was close, I asked her where I should cum. She looked back at me with lust in her eyes, and whispered for me to cum inside of her pussy, because she had just gotten off birth control, and she wanted to have my baby, but didn’t want Tom to know. That was a huge turn-on for me, and after a couple more plunges into her pussy, unloaded all my hot cum. She purred, and whispered that she could feel it hit her fertile cervix, and told me “thank you for the baby”. I pulled out, and Katie took me back in her mouth, and sucked me dry, and gave me a final wink. I looked over, and watched, as Tom was fucking Laura from behind, and they both climaxed at the same time too. I watched as Tom pumped his seed into Laura, but I knew it was okay because Laura was still on the IUD, and there was no risk. It was super-hot watching another man’s cum running down my wife’s legs, and I got hard again. Katie noticed, and took my cock back in her mouth, sucking like I had never felt before. The feeling was so amazing, and sure enough, I soon came again, cumming in her mouth. She removed her mouth, and swallowed, looking me in the eyes as she did it, wiping a little dribble from her chin that had spilled. We all smiled at each other, and decided to call it a night, due to the water getting cold. We decided to go into the bedroom to sleep, but that is for another story…