What I'm about to relate happened a few years ago. I am a reasonably good looking and fit guy of average height and build. At the time this occurred, I was 55 years old, living quietly by myself after a divorce many years before. I was in two long term and satisfactory sexual relationships with two separate women in my age group. A couple of years prior to this a very nice, quiet couple named Harold and Mary moved into the house next door. We gradually became friendly, mainly due to Harold and I having what evolved into long conversations over the chest high fence separating our two gardens. Whenever we would see each other in our respective gardens, we would wind up comfortably talking over the fence, often for quite a long time. Occasionally during these talks, Harold would invite me over to their garden or inside to their lounge, and Mary would join us for a quiet afternoon's conversation. This became a very enjoyable pastime for us and we became fairly good friends. Mary looked to be in her mid-50s at the time, very quiet, with a reasonably pert average height build and a somewhat pretty face- no great beauty, but still, rather nice to look at. She reminded me of the older sister type rather than the potential date type. Harold was tall and fit, and looked to be about 5 years older than Mary. After a while, it became obvious to me that the two of them were still very much in love with, and deeply cared for, each other. Harold had met Mary when she was a 19 year old secretary working for the same company Harold did. They married two years later and had been together ever since. One day, I saw Harold in his garden and walked toward the fence separating us. As he approached the fence, I had the vague feeling he had been waiting for me to appear. He came toward me with what looked like a somewhat worried or concerned expression on his face - not his usual self. I asked if there something the matter. He didn't answer right away, but seemed to be making up his mind about something. After a few moments, he appeared to make a decision, and asked me to join him in their garden. I did so and we sat in the nice sitting area they had where the three of us usually conversed. He would always call to Mary to join us, but this time he didn't. He still had that worried/concerned look on his face and proceeded to say that what he was about to tell me was a very personal and delicate matter, and that I must promise to never tell anyone else about it. This startled me, but I readily agreed. He then proceeded to tell me that Mary was 65 years old and he was 78 years old. I was surprised since they both looked much younger. They had been married for 46 years and had a wonderful life together in every way, including in the bedroom. The problem started about the time they moved into the house next to me about 2 years previously. He started to have erection problems and it had now progressed to the point where, even though he could become erect, he could not keep it for anywhere long enough to satisfy Mary (this was in the days before Viagra). He said Mary still very much enjoyed sex and did not want to give it up. She was very loving and supportive to him during this time and he felt very bad not being able to satisfy her in bed, except orally. They had discussed the possible solutions and the only that made sense was to invite another man into their bedroom to satisfy her. They considered how to do this and Mary wanted nothing to with looking for men in pubs, clubs, dogging, swap scenes, etc. Harold said they had came to an impasse on what to do when Mary very shyly told him she thought they should privately invite another man into their bed, but it would have to be someone about whom they were both comfortable. He then asked her if she had anybody in mind and she, again very shyly, suggested me. He told her that would be fine with him since he felt comfortable with me being the one. Even though I had started to get a glimmer of where his story was heading, it still somewhat shocked me when he got to this point. I sat back in my chair and was silent for a little while, absorbing what he had just told me and sorting out my conflicting thoughts about it. The first thing that hit me was that I was getting feelings of arousal thinking about having a new woman in bed. Then I realized this could damage or end the very nice friendship that I valued with my next door neighbors. Then I wondered how Harold would react to another man in his bed once it actually happened. And, finally, I worried whether or not I could be the kind of lover Mary needed, and could I satisfy her. This mass of conflicting concerns were swirling around my brain when I heard Harold asking if he had shocked me. I told him I didn't know since his request came from "out of the blue". I related to him my all concerns and told him I wanted to do it on a sexual level since the thought of making love to Mary appealed to me (my growing sexual arousal kicking in) but, I didn't want to hurt our friendship. He said they had thought long and hard about this the past few weeks and were convinced that, for many reasons, I was by far their best choice. I again sat back thinking about this and finally said OK. I then asked him "where and when"; and he replied "in our bedroom" and "now", if that was OK with me. He then told me there would be some ground rules: no anal or BDSM, no condoms since Mary loved the feeling of cum spurting up her, her favorite position was "missionary", start off gently and slowly work her up to the deep hard pounding stage, and that Mary loved at least 1-2 hour sessions (no "wham, bam, thank you ma'am"). I was getting aroused while he was saying all of this and was now semi-hard. By now, my mental image of Mary had turned from that of an older sister to that of a desirable sex partner. I was seeing her in a new light and the thought of making love to her had become very appealing. Harold ended up by reminding me that Mary was basically a shy person and that extended to the bedroom, at least initially. He also told me that upon arousal Mary's nipples thickened and needed to be rubbed and sucked, and to use both mouth and fingers on her pussy during foreplay. I asked him how do we begin. He told me Mary was waiting for me in the kitchen and that I should go in now and approach her. He said he would wait in the garden. I went inside and found her facing away from me at the sink hand drying some dishes. She was barefoot and had on a plain white blouse and a short plain flared skirt. I approached her without saying anything, but it was obvious she had either sensed or heard me for she put down the dish she was drying and remained still waiting for me to reach her. I stood very close to the back of her, reached around her waist with both arms and gently rested my hands on her stomach. Even though she knew what I was doing, her body quivered a little when my hands rested flat on her belly. I placed my face in her hair and breathed in her smell. At that point she relaxed back into my body and placed her hands over mine, silently telling me that she was comfortable with me proceeding. Just that small action by her had a highly erotic effect on me and I now had a full erection inside my pants. I moved the last few inches toward he so that our bodies molded together. I knew she could feel my erection against her bum. We stayed like that for what seemed like an eternity, even though it was only for a few minutes, both of us gently molding our bodies together and swaying a bit. I gently moved my hands over her belly - her hands over mine. I continued to gently move my face in her hair and I breathed in her smell. I was almost getting light headed with the smell and gentle movements this shy, quiet woman while, in my mind, Mary's transformation into a sexually desirable partner was now complete. I snapped out of my reverie when Mary said "let me turn around so I can see you". She turned around and I looked down into her face and saw her arousal beginning. I put my arms around her shoulders and caressed her upper back with my hands while she gently put her arms about my waist. She looked up into my face and I kissed her for the first time, my kisses lightly exploring her lips. She moved in closer to me and molded her body into mine. I'm sure she could feel my hard-on against her lower abdomen. As if to prove me right, she gently started thrusting her hips into mine while I moved my hands down to her bum cheeks and caressed them. She opened her lips a bit and I slipped my tongue a little way into her mouth, then withdrew it. I slowly repeated this several times, moving my tongue into her mouth a bit deeper each time. She was responding very nicely, meeting my tongue with hers while applying a slight pressure each time. Sensing that we were making a real sexual connection, I stopped the kissing and slightly pulled my head back from her face. looked deep into her eyes and said "yes, I do want to make slow, passionate love with you - will you let me?' Somehow that seemed to be what she wanted to hear, because she replied "yes, I want that too - maybe we should move to the bedroom". We broke away from each other. She grasped my hand, led me out of the kitchen, and headed toward the bedroom with her leading the way. Half way there, she turned to face me and said "kiss me again". I pulled her into me. She reached up and wrapped her arms around my neck, and I started kissing her the same way as before. At the same time, I placed my hands on each side of her waist and slowly moved them up until my thumbs were touching the lower edge of her breasts through her clothing. As we French kissed more and more deeply, I thumbed her nipples through her blouse and bra. Her breasts were medium sized and felt firm. It felt like her nipples were facing straight out and not sagging like most women her age. As I thumbed them, her nipples became thick and elongated, and her breathing became deeper and a bit ragged. She pulled away looking slightly flushed and said we should get to the bedroom. As we entered their bedroom, I started to close the door to the hallway but she said to leave it open as Harold might want to listen to us. I didn't know why, but the thought of my lover's husband listening to us making love was very erotic. We stood close to the bed and resumed kissing. By now she was allowing my tongue to explore all the reaches of her mouth and she did the same to me as we alternated tonguing each other. By this time we were grinding our hips into each other's crotch. Every so often she gave out a low whimper as I resumed thumbing her nipples through her clothing. She was becoming highly aroused. At this point she broke way from our kissing and petting, and reached for the buttons of my shirt. I let my arms fall down by my sides while she unbuttoned my shirt and peeled it off me. As she did so, she said, "when you take off my blouse and bra, I want to feel the skin of your chest against my breasts". I thought to myself, I can understand why Harold wants to keep her sexually happy in any way he can. Now it was my turn. I unbuttoned her blouse, peeled it off her, unhooked her bra, and slowly lowered it from her breasts. I stared at them and I was right. Her nipples were thick cones and ended in elongated can shaped cylinders. They were absolutely beautiful. Not many women had such nipples, and the ones who do are very lucky, as are their lovers. Her breasts were perfectly sized and shaped, almost ski sloped and just a handful in size. Perfect. I was mesmerized staring at them until she whispered "aren't you going to touch them"? Brought back to reality, I gently thumbed and kissed and sucked her nipples, and cupped and caressed her breasts for several minutes. Looking up quickly while ministering to her breasts, and I saw that her eyes were closed, her head thrown back a bit, and her hands gripped my upper arms to keep her balance. She was definitely enjoying this. Finally she recovered, and told me to stop. She gave me a full body hug and rubbed her breasts against my chest for a minute or two . Then she pulled me forward while she backed up the remaining foot or two to the edge of the bed and sat down. She then unbuckled by belt, unzipped my fly, and lowered my pants. I kicked off my shoes, peeled off my socks, and pushed off my pants. My cock was straining against my boxers. She pulled me towards her and my still encased cock was level with her mouth. She looked up at me shyly and said "can I see it"? I dumbly nodded and, instead of pulling it out through the fly of the boxers, she undid the waist snap and slid my boxers down my legs enough so that my cock was free. By now I was almost fully erect. She looked up at me shyly, then looked back down and reached for it. She wrapped one hand around the shaft and cupped my balls gently with her other hand. Just the touch of her hands was enough for me to become fully erect. I'm only average in length - about 6 1/2 inches, but wider than most. Not having asked Harold how big he was, I didn't know if I was a disappointment to her. Almost as if reading my mind, she said "you're about the same length as Harold, but you're wider", and she proceeded to give me a very nice hand job interspersed with very nice sucking. She was no amateur at this. By now I was involuntarily thrusting alternately into her hand and her mouth. I started to feel the cum rise up in me told her she better stop, and said "my turn" as I pulled her up off the bed and switched places with her. I had her stand in front of me, unzipped he skirt, and lowered it off her legs. After she kicked off her skirt, she stood in front of me clad only in panties. I glanced up toward her face and saw above me her fantastic nipples jutting out from beautifully sized and shaped breasts. I lowered my gaze to her panty clad pussy and imagined what it looked like. I was taking this slowly because I wanted to savor every moment of our fist encounter. I moved my face into her crotch and inhaled the warm tangy odor of a woman in heat. There is no other smell like it in the world and, as I inhaled it deeply, my cock jerked in reaction. I put my left hand on her right bum cheek and lowered my right hand to cup her pussy, gently rubbing it. After a short time, I started rubbing my middle finger in her slit through the panties. She now had her hands on the top of my shoulders to steady herself while I caressed her pussy. She moaned and said "take down my panties, I want to feel your fingers inside me". Welcoming her request, I pushed her panties down her legs. Holding onto my shoulders for balance as she leaned down, she kicked them off, then straightened up fully exposing her hairy pussy to me. She had thin silky light colored hair, nicely trimmed just right. She had beautiful pussy hair - not too much and not too little. I buried my nose in her hair and deeply inhaled again. Her odor was stronger without the panties. Holding her bum cheek with one hand, I brought the other hand up to her slit and dipped in with one finger. She was very wet, so I put the one finger in all the way. I pulled it out and inserted two fingers, then three, which was about right based on her gaps and thrusts against my hand. I pushed three fingers all the way in, held them there while I probed for her "G" spot, found it, and proceeded to massage it with my fingers. She snapped her head back and let out a moan. I started a rhythm with my hand and fingers of thrusting in all the way, massaging her "G" spot, pulling out half way, then repeating the cycle. As I did this to her, I started out slowly, then moved faster and faster. She had her head thrust back and her mouth open, steadying herself by holding the top of my shoulders with one hand on each of my shoulders. Soon she started to moan in time with the thrusts of my hand, getting louder and louder until, with her hips jerking uncontrollably, she screamed out her orgasm, which continued for about 30 seconds (a fairly long time when one is climaxing). As she slowly came down from her orgasm, she half collapsed onto me. I pulled my hand out of her now sopping wet pussy and stood her up against me as I rose off the bed. I body hugged her with my left arm and inhaled the womanly odor rising from my right hand and fingers. Her smell was intoxicating. It was reinforced by the knowledge that she now was a woman fully in heat. Even resting upright in my body hug, she exuded raw sex - her odor permeating the room and my cock straining against her, looking for sexual release. Later, Harold told me he got incredibly aroused when he heard her moans and screams as he sat in the lounge. I moved her onto the middle of the bed on her back. She lay with one arm behind her neck, the other arm resting on her tummy. Her knees were bent and her legs were fully splayed out, revealing the full beauty of her womanly charms. Her pussy hair was nicely rimming her now wide open vagina. I kneeled between her legs, sat back on my haunches, and stared at her womanly loveliness. I thought, God, she's beautiful. Too soon, my cock was jerky on its own, but I anted to give her another orgasm, this time with my mouth. I lay down between her legs on my elbows and fore arms with my mouth at her opening. I lowered my mouth to her pussy and started lapping at her clit with my tongue. I flicked it left, right, up, down, and in a circular movement, slowly speeding up the action. After a short while, her hips started to rotate up and down and then also start to rise up as she got closer to her orgasm. Her moans became louder and, when I thought she was very close, I sucked very hard at her clit. Within a few more seconds, she violently arched her body upward, suspended off the bed between her feet and elbows, and screamed out her second climax. She held that body position while her hips jerked uncontrollably, then collapsed back onto the bed. She appeared to be "wrung out" by this orgasm and just lie there whimpering. I sat up between her legs and watched as she came down. It took a bit longer than before. After she came down, I splayed her legs apart as far as they would go, lay on her, and inserted my cock. God, she felt fantastic as I slowly thrust all the way in, and started to stroke her as deep as I could. After a short while, she wrapped her arms around my upper body and raised her knees on either side of me. The feeling of being in her was so good that I was in no hurry (it helped a lot that I was very adequately laid by one of my two lady friends the night before). Later, Harold told me he heard her scream out her second orgasm, came to the bedroom door, peaked in and watched me fuck her. He said the sight was so erotic that he was able to keep a hard-on long enough to wank it to a cum. Back in the bedroom, I fucked her suspending myself on my knees and elbows. This allowed me to French kiss her as I stroked into her with my cock. She was now fully recovered and tonguing me back with ardor. This went on for more than five minutes when I felt the cum rising up in me. She was holding more tightly onto me and her hip thrusts in response to my cock thrusts were getting deeper. It felt like she was getting close, so I whispered into her ear "are you getting close?" She grunted "yes" back to me and increased her hip thrusts. That was my signal to speed up my thrusts as well as go deeper if I could. We increased our tempo together and went into overdrive. Soon I was shooting my cum into her and she screamed out yet another climax. We continued to hump each other trying to prolong the orgasm. I finally collapsed on her with my slowly deflating cock still in her. After we recovered, I rolled off her onto my back and reached for her. I asked her to cuddle with me and she lay halfway on me with one leg over my hips with her face nuzzling into my neck. This is my favorite position to sleep with a woman. It must have been hers also because we soon fell asleep in each others arms for a short nap. I awoke after about ten minutes to feel her rubbing her crotch on my leg. The eroticism of her movements was heightened by the feel of my cum leaking from her pussy onto my leg, lubricating her movement. That was enough to start my cock rising. I soon rolled her over onto her back and slowly got between her legs. My cock was semi-hard, but that was enough to get it into her. Once in her, the feel of being in her together with the feel of her muscles nipping at my cock brought it to a full erection. We repeated our sexual union but, this time, I finished by pounding her pussy, not being gentle at all. She loved it and told me so by her violent climax. We had several more episodes during what turned out to be a 3 hour session. By the end of it, we were both totally "fucked out". We thanked each other profusely and, as I got up to get dressed and go, I asked her "what about Harold?' She replied that as soon as I left the bedroom, she expected him to join her on the bed and cuddle with her and, maybe, talk about how she liked it. The next day the three of us talked about it sitting in their garden. The bottom line was that I became her regular lover on a once or twice a week basis. Harold was alright with it because Mary was being well satisfied by a friend, wasn't going out looking for it, and wasn't going to fall out of love with him. And I was happy because Mary was a fantastic lover and one of my two lady friends moved on, giving me the time and energy to service Mary. This arrangement continues to this day.