I dated Kathy a few times at university; nothing serious, just some kissing and roaming of hands over her ripe body. I was casually dating two or three others at the time and shagging one of them, so when Kathy suddenly took up with my mate Roger it was no big deal. Fast forward about ten years to a year ago and Kathy and Roger are married. Over the years when I worked alongside Roger, we were a social threesome and we often did the pub scene with my date of the month as the fourth. Over time, Kathy and I became close like brother and sister and, with Roger's approval, enjoyed frequent gossipy lunches. I didn't see much of them after I moved about a hundred miles away three years ago for a better job but, whenever in their area, we three would enjoy a pub evening. About a year ago I called and Kathy answered the phone. I told her I would be there on business for a few days and could the three of us meet one evening. She sounded upset when she said, "Roger's away for two weeks on travel, but it's good you called because I need to talk to you. Can the two of us get together when you're here?" I asked what was wrong, but she wouldn't tell me. I arrived at theirs late in the afternoon a few days later after a day of meetings. She gave me her usual welcoming hug, got us some wine, and we sat opposite each other in their lounge. She said she needed to talk to me about their marriage since she was too embarrassed to talk to anyone else, plus I knew their history better than anyone. Seems Roger was having an affair with someone at work and the woman was with him on his travel. Kathy said she was certain as she had been suspicious for a while and just a few days before Roger left she had seen the incriminating texts on his mobile. She said she still loved him and didn't know what to do. I was a bit shocked since I knew Roger had been crazy in love with her, certainly while I was living in their area. She looked miserable and I moved next to her and gave her a big brotherly hug. She started to cry and with a choking voice asked me what she should do. I told her she basically had three choices. She could confront him and decide whether they were both willing to make the marriage work, she could leave him, or she could leave it be to see if he came back to his senses. She thought about it for a long time after her tears subsided. Finally, a determined look come into her face. She turned her head toward me and said, "I am so hurt and feel so betrayed. I'm not sure I care about the marriage anymore. Right now I just want to get even. You're my best friend in the world and if Roger hadn't come along, I would have gone after you, especially after having those delicious kisses and body rubs at university." Seeing which way this was heading, I quickly interrupted her with, "No, no. You don't want to do what you're thinking. You need to find out how serious he is with her - maybe it's only a one off and he'll regret it." She waved this off and said, "Even if our marriage survives, it's not fair he gets to be unfaithful when I've been faithful to him all these years. There have been plenty of times I could have strayed, but didn't." With that, she stood up, grabbed my hands, and tugged me up off the sofa. She slid her hands around the back of my head and said, "I need to do this", as she pulled my face down to her lips. Suddenly, I remembered those university days and the memory inflamed me. I couldn't help returning her kiss. Our kisses deepened and soon we were plundering each others mouth with our tongues. I quickly realized she had become a much better kisser than when we dated years before. While still kissing, I placed both hands on her tummy to just below her breasts and reached up for her nipples with my thumbs, discovering she still went without a bra over her small firm breasts. I thumbed her nipples into hardness, then moved my hands up and caressed her breasts. When I rubbed her nipples between my fingers, she moaned and rubbed her groin into me. I quickly unbuttoned her blouse and moved my mouth onto her breasts, sucking them, then gently nibbling her nipples. Her moans deepened and I put one arm behind her back and lifted her up with my other arm under her knees, and carried her to the spare bedroom beyond the lounge. Once inside, I lowered her onto the bed. She looked up at me as she lay there in her jeans and opened blouse, her beautiful breasts fully exposed and her stiff nipples pointing up at me. That sight, coupled with the languid look on her face capped by a lazy smile, sent lust rocketing straight into my groin and I felt myself get hard. I quickly undressed and saw her watching me, especially when my fully erect manhood appeared. I knelt on the bed and continued caressing her breasts and sucking her nipples, while moving my hand to her tummy, gently kneading it a bit before moving it over her jeans. I cupped her mound and briefly rubbed it through the material, then opened her jeans and removed them when she arched up her hips to help me. She lay there in her lacy knickers, smiled wickedly at me, then raised her knees and spread her legs apart, opening her thinly covered womanhood to my view. She watched as I staring at her charms with lust on my face. She rolled her groin toward me and when a lustful groan escaped my lips, she said softly, "I had no idea I would have this effect on you." I slid her knickers down and off, then moved my hand over her mound and cupped her womanhood. Running a finger along her groove, I found she was hot, swollen, and wet. As I pushed my fingers into her, I said, "I can't believe how hot you look." She moaned and replied, "I've been hot and wet for you since you kissed my nipples in the lounge." Her hips rose against my hand as my fingers rummaged around inside as I enjoyed the hot slippery feel of her heat. I moved my fingers rapidly in and out, then heard her say, "I'm ready for you. I want you in me now." After a few more intimate strokes, I withdrew my hand and knelt between her legs. I stared at the soft silky copper colored hair on her mound and around her pouting lower mouth, and felt my member throb, bouncing in anticipation. But it would have to wait awhile. I lowered my face to her groin and deeply breathed in her wonderful womanly odor several times. After enjoying her intoxicating feminine smell for a few moments, I lowered my mouth and began running my tongue up and down her slit, holding it open with my thumbs. At the top of each stroke, I swirled my tongue around her hard nub, then flicked it. As I steadily tongued her, I heard her softly moan, "Oh, my God, I can't believe how fabulous that feels. Don't stop!" I continued a little while longer, then felt her hips shudder a bit against my mouth, her moaning become erratic. She was close, so I increased the pressure and speed of my tongue. Her hip movements became frantic as she put her hands behind my head and pulled me tighter into her. She was right at the edge, so I wrapped my lips around her swollen clit and sucked hard while flicking it with the tip of my tongue. She groaned loudly a few times, then gasped, "I'm there! I'm coming! Don't stop!" Her climax was long and intense, her hips jerked wildly, and her legs wrapped around my head. I keep sucking, then gently licking as she finally came down from an intense orgasm. I watched her body slowly relax, her eyes closed and her legs splayed wide open. I gave her time to recover, then asked, "Are you alright?" She nodded and said in a low voice, "That was fabulous - you can do that to me anytime!" I grinned broadly but before I could respond she said, "I need to feel you inside me now - don't make me wait any longer!" I moved between her legs, guided my member to her entrance, and gently inserting the head. I'm a bit larger in girth than the average so I eased in only a couple of inches, then paused, watching her face for any sign of discomfort. All I saw was a quick look of apprehension. I moved in a bit more and paused again. She realized what I was doing and said, "It's fine. You're not hurting me." I slid in the rest of the way and when I paused once more to let her get used to my size, she smiled again and said, "It feels good. Do me now", as she snaked her arms around my neck, positioned her legs behind my thighs, and pulled my body into hers. I moved slowly in and out, establishing a steadily rising rhythm. She soon rose against me, tightening the grip of her limbs about me and moaned, "Harder - Faster - Deeper." I did as she asked and, after a few minutes, her moaning got louder, then became groaning with encouraging comments like, "Feels so good! That's it. Just like that! Keep going!" She certainly knew what she needed and didn't hesitate to tell me, which I love. By now, I was giving her all I had and she was thrusting hard back at me. She suddenly dropped her legs from behind my thighs, placing her feet flat on the bed and, with knees bent, dug her heels into the mattress, giving her leverage to lift her hips off the bed while I continued thrusting into her. Her groans became louder and she suddenly cried out, "I'm almost there! I'm going to come!" I pounded a bit harder into her and a few seconds later she went over the edge. As her climax hit, her head snapped back and her mouth opened in a silent scream. Her hips trembled, then jerked uncontrollably and, a moment or two later, the silent scream became real as she shouted out, "Oh, my God! I'm coming! I'm coming!" Hearing this and feeling the jerking of her hips against me pushed me over the precipice and I came with my own loud cries of release. It was some minutes before our mutual orgasms and the lengthy coming down afterward were finished. I collapsed on her regaining my breath, then rolled off when my deflating manhood slipped out. We lay there entangled together in each other's arms and legs as we hugged and kissed. We cuddled like that for quite a while regaining our compose. It felt fabulous and I thought Roger was an idiot to go looking for 'strange' when he had such a fabulous lover at home. After lying there for a while, we began caressing each other. She kissed me deeply, then said, "I want to come again. Can I have another one?" When I nodded 'yes', she urged me onto her. I moved between her legs and slid all the way in her sopping cavern in a single stroke. Very soon we each were climbing rapidly to another peak. After further energetic mutual thrusting, we shouted out our climaxes, then slowly came down as I continued sliding in her. Our love making lasted another hour or so as she had me next with her on top, then finishing up with her on her hands and knees with me ramming her senseless . By the time we finished, we were both fucked out and slept for several hours before awakening a around midnight, both of us famished. We sat naked in the kitchen eating omelets. I had been totally entranced watching as she moved naked about the kitchen making the omelets. We moved to the lounge and talked for a couple of hours before exhaustion finally made us go back to bed where we shagged twice more before morning, when we did it once more. She was a fabulous sex partner, enthusiastic and very open with her feelings, as well as not being shy about verbally guiding me to ensure she got what she needed. That latter attribute is a big turn-on for me since it's a real boost to my pleasure when I know my partner is also enjoying it to the maximum. Too many times women lie there expecting the man to know exacting what she wants and how to give it to her. This is difficult and frustrating, especially at the beginning of a sexual relationship, since each woman has her own particular nuances of technique as well as enjoying some positions more than others. As she told me the next afternoon when I returned from my meetings, the previous night together in bed had done wonders for her self-esteem as a woman and it enabled her to view their marriage and the impact of Roger's infidelity in a more reasonable light. It also gave her the confidence to face whatever was going to happen with their marriage since she knew she would have no trouble attracting other men. I slept with her each of the three remaining nights I was in town, having fabulous sex with a wonderfully uninhibited woman. When Roger returned from his travel, she confronted him and made him move out while she considered what to do. He soon ended his affair and, after a month or so apart, told her he wanted to come back. After some intense discussion and negotiation, she allowed him to return so they could save their marriage, but on condition he never again stray. Since then, she sleeps and has sex with Roger, and I continue to be with other women, but she is having her revenge. Each time Roger is away on travel, I travel to hers and we have fabulous sex, and she's made it clear she wants this to continue. No argument from me!