I'm a commercial artist in my 30s and like to stay in shape by running almost daily on a path by the water near where I live, and then return to continue work in my home studio. There are some nice spots for caravans and tents along the way. I leave the tourists alone unless they want to chat. On one occasion last year there was an older couple with a small caravan. He was a friendly guy, maybe late 60's. His wife was late 50's or early 60's, about average height, but slim with a very good figure for her age. He and I chatted for a while before I continued my run, and I thought nothing of it at the time. The next day they were still there. This time he offered me a beer with the chat. This is not good for running, but I took a few sips anyway since he was such a nice guy, figuring I'd just take it easy when I continued on. He and I were chatting as before, this time with the wife lying stretched out on a chaise longue nearby in a sundress that showed the tops of what looked like toned breasts. She looked our way and subtly nodded to him. He looked a bit nervous, then quickly explained he can't please his wife like he used to and asked if I'd help them out. As he said this, she looked over and gave me a shy smile as he explains further that they've talked about it and she would like me to be the one. What he didn't know was I have a thing for mature ladies and her shy demeanor and slim body with the good figure was very attractive to me. He and I shook hands and he said he would stay sitting outside while she and I went inside. By this time she had moved and was standing in the doorway of their caravan with that shy smile looking very nervous. I walked over and stood on the ground just inches from her body. The doorway was about a foot higher so my face was at the level of her breasts. I put my hands on each side of her waist and gently pulled her against me, nestling my face in the hollow between her breasts. She gasped in surprise as I nuzzled that hollow, rapidly moving my face a bit from side to side between the inside curves of her breasts. As I did so, I slid my left hand from her waist down onto her bum and slid my right hand from the other side of her waist around to her tummy. I kneaded her bum cheeks with the one hand and kneaded her tummy with the other. She soon issued some short pleasurable moans as I ministered to her body in a way she never expected, and her nervousness started to diminish. She soon ran her fingers through my hair and bent her head to kiss my cheek. She was becoming comfortable with me handling her body. That's when I moved my face from the hollow between her breasts and moved my mouth to her left nipple poking through the sundress since she wasn't wearing a bra. I nipped and sucked her nipple through her dress - first one, then the other, and back again, until she said in a low voice, "Let's go inside." That was her telling me she wanted what we were going to do - but I wasn't quite ready. I slid my hand down from her tummy over her feminine mound and pushed the dress into the space between her thighs where they met. I rubbed her womanhood through the material of her dress for a few seconds, then lifted the hem of her dress and ran my hand quickly up between her naked thighs until my fingers found the gusset of her panties. I slid my fingers along her slit through her panties. She gasped, then gasped again when my fingertips quickly found her clit and rubbed it. That's when I said to her, "Yes, it's now time to go inside." She stepped backward to give me room to mount the two steps and get inside. I closed the door, then pulled her into me and initiated a deep kiss. Even her shyness was now gone as she immediately opened her lips and let my tongue in to slide against hers. She quickly pushed her tongue against mine and started sucking it, and we were immediately into deep, wet French kisses.. As we stood there kissing deeply and passionately, I caressed her breasts with my hands, cupping them through the thin material of her dress and rubbing her nipples between my fingertips. They soon turned into hard pebble-like nubs under my fingers. She wrapped her arms around my neck, kissing me continuously, and pushing her hips into me. The shy nervous wife was gone and in her place was a passionate woman beginning an affair with a man other than her husband. I loved it! We finally broke apart and she sat on the edge the bed and quickly unbuttoned her dress the whole way, then stopped and stared as I quickly got rid of my running shoes and kit. As I lowered my pants, my thick semi-hard cock was sticking out and half curved downward. Then, as I recognized lust on her face as she stared at my cock, it straightened upward and became fully erect without me touching it. As I strode the few steps to where she stood next to the bed, she got rid of the dress, then remained standing there, naked except for her panties. She was absolutely lovely and it was hard to imagine she had recently celebrated her 59th birthday. I stared at her fit and trim body with its perfectly sized breasts. When she saw the lust in my look, she said in a low voice, "It's been a long time, so please go slowly. I want to really enjoy this." I ran my hand up between her thighs and again fingered her slit through the gusset of her panties. She moaned as she closed her eyes. I slid her panties down her well toned legs and off. I found out later that her fit and trim body was due to a lifetime of jogging. I knelt before her, which placed my face at the level of her womanhood, and nuzzled my nose into the place where her thighs met and formed a 'V'. I deeply breathed in her sweet/pungent womanly odor, then flicked my tongue out and pushed the tip into her moist slit. She gasped in surprise, then quickly moved her legs apart a bit to give me access to her treasure. I held her lips apart with my thumbs and licked her slit a few times, each time ending with my tongue swirling her clit. She gasped and her hips bucked each time I did that. I wanted to do more, but my kneeling position was awkward, so I urged her up onto the bed on her back. She automatically spread her legs as she settled back. I quickly lay on my stomach and brought my head to her wide open center, and slowly licked her slit and clit with long strokes of my tongue. I was gong slowly as she had asked, but she soon started moaning and pulling my head further into her. She was getting close, so I speeded up the pace as her passion rose. Her moans became deeper and more urgent. Then she moaned, "I'm close. Make me come." I pushed my tongue much more firmly against her clit, then suddenly pushed three fingers inside and rapidly finger fucked her. The suddenness of the penetration and the rapid in and out thrusts of my fingers pushed her over the edge. She came with wails of release, and thrashing of her hips and hard trembling of her thighs. Her climax last a long time before her gasps quieted and her body stilled. When she was finished, I moved up her body and she splayed her knees outward, totally opening herself up for me. I lowered myself between her legs. She reached down between us and guided the head of my cock to her entrance, then rubbed it up and down her slit and over her clit for a few moments before pushing the head just inside. As she withdrew her hand and placed it with its mate around my shoulders, I pushed in gently. She was snug, but sopping wet, so my gentle pushes met no resistance as I worked my cock all the way inside. When I paused fully inside to enjoy the feel of her pussy wrapped around my cock, she whispered into my ear, "Please go really slow and deep, but end by fucking my brains out. And take your time. I want to really enjoy this." I fucked her just like she wanted. It must have taken ten minutes to get her to her first climax with me inside. She screamed when it hit her and her body went into violent movements as her orgasm rolled over her in several waves. I could feel each of them hit her since with each one her pussy muscles squeezed my cock and nipped it. When I felt her come down a bit, I pounded into her again, and she had another climax. I did this several more times in quick succession until she gasped, "No more. Let me rest a bit." When our mutual heavy breathing subsided, she asked, "When are you going to come?" I started moving in her again as I said, "I think right now." I fucked her slowly at first, then quickly speeded up as my passion for a climax kicked in, and soon was pounding her hard and deep. She was with me the whole way and, between pants, she moaned, "I'm going to come again! Oh, God! I'm going to come!" Her hips then started thrashing beneath me and she screamed, "Yes! Yes! Yes! Oh, Yessss!!!' as she came. That was it for me, Feeling her come under me sent me over the edge and I pounded out my own climax, spurting my hot cum up her for what seemed like forever. When we both finally quieted and her body slumped back against the mattress, I stayed inside her, lying between her legs and enjoying my post orgasmic afterglow until I finally withdrew my softening cock and rolled off. We kissed and cuddled lying next to each for a long while until I looked up and saw her husband standing a few feet away slowly wanking his cock. It wasn't totally hard, but hard enough for him to have come watching us fuck since his cum was all over his hand and some had dripped onto the floor. He had heard us going at it, and couldn't resist coming inside to watch. His passion was ignited watching us and he found he could bring himself off as we fucked. I suggested he join her on the bed in my place, and I got up. He joined her as I dressed and left for home. That night I re-lived our encounter in my mind and brought myself off a couple of times since she had been a fabulous fuck. I wondered if I could have her again the next day. I returned in the morning and saw their caravan was still there. I knocked on the door. He opened it stark naked and invited me in with a broad smile. She was lying in bed with her dressing gown rucked up above her breasts, fingering her pussy. He proudly informed me that the images on me fucking his wife had made him so horny, he had gotten hard enough to get into her several times and stroke for a short while. Not enough for him to come and certainly not enough for her to come, but still satisfying for him nonetheless. Each time she brought herself off with her fingers while his cock was in her. She said to me it had been enough, but since I was there, she asked him if she could have me again. He quickly agreed and I undressed and replaced him in bed with her. She opened herself up for me and I quickly mounted her, sliding my hard cock up her. She moaned as she wrapped her arms and legs around my body and said into my ear, but loud enough for him to hear, "Fuck me. Fuck me hard and make me come." I was there for two hours servicing her and watching him get hard enough to enter her for a bit, then get out and wank his softening cock to a come. They were there for three more days and I had her all three mornings, then returned late each night for another long bout of sex with the most erotic 59 year old lady I had ever met. They plan on spending their upcoming holiday this year with their caravan in that same spot for a fortnight. I can't wait.