I'd just checked into my room at the mountaintop resort where the conference was being held. As I pulled back the curtains to enjoy the view, a man on the next balcony waved to get my attention. When I opened the window he explained that they were locked out of their room. I called the front desk and the clerk laughed, "Happens all the time." The desk clerk and I opened the sliding door for the couple who were lightly dressed for the cool day. I was offered a glass of wine, which turned into two, and cheese and crackers. They were taking a getaway night because the husband, Adrian, was an engineer about to go into a very busy project. Brenda, his wife was the mother of two teenagers which put them somewhere around forty. We visited for an hour until it was time for my opening reception and their dinner. As we walked back through the room I noticed that one of the beds was very much "slept in". Considering that I rescued them about an hour after check in, it appeared that they hadn't delay enjoying the amenities. As I left, Brenda gave me a warm hug and asked me to knock on their door when I returned to my room so she could "thank me properly". Hmmmm... A couple of hours later my knock was answered by Adrian in a robe. We stopped at the beverage nook for glasses of wine before I followed him to the window end of the dimly lit room. Brenda was asleep under a sheet in the first of the twin queens in the room. We sat in the chairs flanking the balcony door and talked quietly. After a bit Brenda stirred, looked over at us, got up and walked nude to the bathroom. When she came out she walked over to me, twirled slowly around, and said, "Would you like your reward now?" I looked over at Adrian who smiled and nodded. I did the same to Brenda and stood up. In front of me was a pretty typical middle aged mom who took reasonably good care of herself. From the top, dishwater blond shoulder length straight hair, a pretty face even without makeup, matronly tits with nice hang and erect nipples, a rounded but not protrouding belly above a neat light brown muff, the hips of a mother on top of nicely shaped legs. An attractive package. She unbuttoned my shirt then knelt down to undo my pants. I was well on my way to hardness when she dropped my drawers and helped me out of my shoes and pant legs. She kissed the head of her new friend and glanced at her husband who was watching intently. We didn't speak as she led me to the shower where we got acquainted with each others' bodies as we soaped and then towelled off. We returned to the bed that she had already been fucked at least twice in. Adrian had put a towel over the wet spot and was sitting naked on the other bed ready to watch the show. Brenda laid me on my back and treated my dick to caresses, licks, and sucks for a few minutes. I wondered if she would expect me to eat her freshly fucked cunt but, after a few minutes, she straddled me and lowered the first pussy I'd had in quite a while all the way onto my ready rod. The hot silky grip was incredible. I reached for her tits and pleasured them as she, eyes closed, began moving on top of me. Her husband was walking around to see this sexy sight from every possible angle. As I bent my head up to suck her hard nipples I could see, out of the corner of my eye his erection getting closer. He probably wanted her to suck on him but his wife's eyes were closed as she concentrated on our pleasures. In spite of a feeble attempt to withhold my climax, I soon blasted cum into this sexy sheath. Brenda opened her eyes as she felt the hot pulses and smiled at me. After a few cunt squeezes on my pecker she rolled off onto her back. Adrian was in her almost as soon as she spread her legs. He hammered her snatch as I watched. She hadn't orgasmed with me but soon wrapped her legs around her husband, slammed her hips against him even harder, and wailed as she twitched and jerked. I could see Adrian's balls tense as he fired his load in with mine. They lay together panting for a while and Adrian rolled to the far side. Brenda whispered, "I've NEVER cum like that! I've never felt more female in my life!" Adrian propped himself up on an elbow and asked, "Not even when we were dating?" She shook her head. Adrian looked at me and said, "That needs some explanation. Brenda was dating my best friend when we met. He got her cherry. We hung around a lot and he knew I liked her too. One night down by the river we had scored a case of beer and were quite a way through it. They'd been fooling around a little in the car but then got out with a blanket and fucked right next to the car. I could hear but not see them. My friend got back in and told me to go get some... it was ok. That was my first piece. She dated both of us separately from then on although we still did stuff together as friends." Brenda interrupted, "Sometimes I would do one of the guys in the afternoon, we would go to a show or dance as a trio, and I would do the other guy afterwards. I really liked both of them. It worked pretty well with nobody ever talking about it overtly until Adrian proposed and I accepted. His friend was a gentleman and found another girlfriend. They came to our wedding and we moved for college soon afterward. I haven't seen him since. Yours is only the third cock I have ever had." Adrian added, "I never saw her with my buddy and have wanted to watch her fuck ever since we got married. We live in a small town and just never found the right guy. Thank you for going along with this." I replied, "I've always wanted this too so you've fulfilled one of my fantasies." Brenda had been fondling both of our cocks as we talked and mine was ready again. This time she pulled me on top and Adrian joined in with his mouth and fingers. It was very interesting to feel him rubbing her pussy and my cock as I stroked. He even cupped my balls gently for a while. Brenda wanted to change position and rolled on her side facing away from me, then raised a leg for my reentrance. They made out as I filled and refilled her vagina with my hard shaft. I cupped and caressed her top tit and Adrian worked in the bottom one. I felt his fingers rubbing her clit with our combined cum and, when he sensed my climax, he held my balls as I sprayed his spouse's cervix with extramarital semen. I stayed deep as he frigged her to a nice orgasm. Figuring that they needed some alone time, and knowing I needed sleep for the meeting tomorrow, I kissed Brenda goodbye, high-fived Adrian, wrapped a towel around my waist, grabbed my clothes, and left. I heard the bed banging against the wall as I drifted off to sleep. At 6:30 my bedside phone rang and a familiar female voice ordered, "Open your door!" I did and Brenda slipped in and dropped her robe. "Adrian got his watching thrill last night and now I want some private time with you." We showered and I surprised her by heading for the Y. She was still reddened and puffy so I figured that they had fucked a lot after I left but I didn't care. She asked me to be gentle as her cunt was understandably tender. The taste of the combined juices was better that I expected. She had a small climax before I moved up and in with my rested pecker. Of course it went inside easily and then I moved gently as we talked. It was a lot about feelings and how the sex was both wicked and good. Wicked because it wasn't her husband's sperm inside her, and good because my cock was different and thrilling. I praised her willingness to be adventuresome, and how exciting and satisfying the sex with her was. She told me that their sex life had decreased in quantity and quality over the years and she hadn't felt very sexy as she aged. Now she did after seeing how she turned me on. Their sex life would certainly be hotter too. She didn't tell Adrian that she sometimes still thought about his buddy and now, for sure, would happily screw him again if she had the chance. She thought that their marriage was strong enough that some more adventures would help rather than hurt and it was Adrian's turn for some "strange". I told her I admired that unselfishness. We picked up the pace and it wasn't long before she was fucking me with more abandon than the night before. We expected that Adrian was listening when we had a big noisy finale. I kissed Brenda goodbye and had to hurry to get to my meeting. As you might imagine, I had a helluva time concentrating on the talks at the meeting so I got my laptop and started to write this story. I wondered just how many times Brenda got fucked during the 19 hours she was at the lodge. I had cum in her pussy three times. I figured that Adrian had done her just before I rescued them, possibly again after dinner before my return, once in front of me and at least once after I left, also probably in the morning before and after she visited my room. That was at least eight fucks between us with the possibility of more if he was capable of it. And I'd bet that their sex life at home was going to be pretty hot for a while too. They had checked out by lunchtime. We hadn't exchanged last names or contact info so I hope that they read this story and contact me at my author's email. I'd love to see them again. Author's note: This story is partly based on a real incident and partly on wishful thinking. Have you figured out the title yet? The 'A' and the 'B' are pretty easy. The 'C' could stand for Cock or Cunt but I prefer Copulation.