I Cheated With My Gym Partner

My name is Dannielle, I'm 27, petite and have always been fit, some might even say sexy. I try to go to the gym as much as I can, I like to keep myself trim so I feel good and look great in tight fitting clothes. I've been married for 7 years and although I love my husband I've always thought sex was a bit overrated. Scott was my first and only sexual partner so I'd just assumed that this was the way it was with everyone. The last thing I ever thought I'd do was cheat.

We hadn't had sex in quite a while and to be honest I didn't feel like I ever really wanted it anyway. Sex was intimate and nice but that was about it. Scott's penis was pretty normal, I'd guess about 5 inches long which I thought was like every other mans. He often said he thought I'd enjoy sex more if his cock wasn't on the small side of average. I just laughed and said I liked sex, just not all the time. We had talked a few times about trying toys in the bedroom to spice things up and I said I was willing to try. One week he came into bedroom with a brown box and said he'd bought something for us to try out in bed, it sounded exciting. Inside the box was a 6.5" dildo. I'd never seen something that big before and was secretly excited to try it. I pretended I wasn't keen but allowed him to talk me into it after a few drinks.

Scott started by kissing me all over to get me ready then slowly inserted the tip of the toy. As he eased it in I realised that he might well have been right about the size thing making me enjoy it more. Once it was all the way in he began rhythmically pounding away. There was a slow build up and I experienced things I'd never felt before, became weak all over, buried my head In a pillow and had what I now know was my first ever orgasm. Scott was clearly pleased with himself and I could see he was very turned on by what he'd just seen. Once he had fallen asleep I couldn't help but think about how great it was but I was really concerned that this would emasculate him and he would never look at me in the same way.

The next morning he couldn't stop talking about it and how he wanted to do it again. After some thought I lied to him by saying I hadn't really enjoyed it and didn't want to do it again because it was a bit painful. I could see he was deflated by this news but I thought this would be better for our relationship in the long term.

Over the coming weeks I often took the dildo out to admire it's size and once, while Scott was away I decided to have a play with it on my own. After a bit of warming up I pushed it in deep and experienced that amazing sensation again. With me being the only person in the house, I didn't have to hold back my reaction. I worked away slowly, then faster and deeper, when I was getting close to climax I started shoving it in like a woman possessed. The release was unbelievable and I screamed out with ecstasy, the bed sheets were going to need to go in the wash as they were absolutely soaked. I'd resolved to have another go with it in the future but with my work and Scott always being around I never seemed to get the chance.

Looking at myself in the mirror lately and seeing how much weight I'd put on over the holidays I'd decided to get back in the gym to get fit again. I joined a new bootcamp gym which was a real shock to the system for me, super hard workouts with lots of very friendly motivated people. The owner saw my potential so partnered me up with one of the fittest guys in there named Bradley. He was an absolute machine who seemed to have endless stamina, I really had to push as hard as I could to keep up. He was an attractive man, around 6 feet tall with an extremely athletic figure. I found myself taking a real shine to him and doing whatever I could to impress.

Chatting to a few of the other ladies after a session, one of them jokingly asked how I was enjoying working out with Brad the bulge?. I didn't really understand what she meant at first but it soon became apparent that quite a few of the girls used to stare at what appeared to be a giant cock in his shorts. Up to that point I'd honestly never noticed and just assumed the girls were saying this as a joke to see if I'd get embarrassed. I shrugged it off and got my gear to go home.

At my next session Bradley walked up and started chatting to me as usual and we got on with our workout. Probably because I was more aware now, I noticed quite a few of the girls glancing over during the session. It felt strange, almost like I was with a celebrity. During an abs section I found myself slyly taking a glance at his crotch. I don't know how I'd missed it before, but oh my!, it looked huge. During the set I couldn't take my eyes off it and could see what the other girls meant now. I was starting to get very turned on and realised I was going to have to be careful I didn't get caught. We moved onto a suspended bar, the exercise was to hang from it and lift your knees to chest. When he dropped his legs down, his grey jogging bottoms left nothing to the imagination. I could see a long, fat pipe in his trousers. Even flaccid it looked decently girthier and longer than my husbands was when it was fully hard. I could feel myself tingling with excitement and turned away quickly, maybe too quickly. I think he caught me staring but I couldn't be sure, my heart was racing. Then he asked me straight out, 'were you just checking out my crotch?' I blushed bright red and blurted out 'no, no, err well..' I realised I'd been caught so had to confess. 'It is quite difficult to ignore something like that' I said with a coy smile. He laughed and said I'd be surprised how often it happens to him. I giggled like a school girl and steered us back to our workout.

That night I had my first sexy dream about Brad, we were in the gym on the knee lift excersie again but this time I slowly pulled down his joggers to reveal a massive dick. I reached out to touch it but before my hand could wrap around it, my alarm went off and woke me up. My Panties were soaking wet and I actually felt embarrassed for a while before remembering that I'd done nothing wrong and it was just a dream. It did however stir a curiosity in me, I wondered if a cock could actually be that big? One night while Scott was sleeping, I crept downstairs and powered on the laptop. I tried searching a few terms like well-endowed and large penis but the results weren't quite what I was expecting, mostly about finance and statistical studies. Then I found the term I was looking for, Monster Cocks. I've never seen dicks that big before, it was quite shocking at first but the more I looked the more turned on I got. In a rare impulsive move for me, I found myself on a sex toy web site looking through the large dildo selection. I wanted something larger than the one upstairs but something that would possibly still fit in me without being painful. The next thing I knew I'd ordered a King Cock 8 inch. I even opted for next day delivery as I knew my husband would be at work and it would hopefully arrived unnoticed.

The day for delivery arrived and I was so nervous it made me feel a bit sick. What if the delivery guy knew what it was, what if it accidentally got delivered to a neighbours house. Either of those scenarios would make me die of embarrassment. Thankfully it arrived in plain packaging and once safely in the house I was super excited. I opened the box and gazed slack jawed, I think I'd gone too big, it was HUGE! I had the house to myself and while I had other things to do, I couldn't get the size of that monster out of my head. I realised that I was just going to have to have a go now so I could get my focus back on other things. I opened up the box again and pulled it out, it looked so lifelike. It was easily three inches bigger in length and impressively thicker that Scotts. I stood it next to the old dildo and it absolutely dwarfed it. 1.5 inches longer and 2 inches bigger in circumference didn't sound much bigger but the reality was, I didn't think I'd be able to fit it in me. Thankfully it came with some lubricant so I grabbed the laptop and went back to the monster cock porn I'd been watching a lot lately to get me ready. While watching a petite woman of about my size take a huge cock and absolutely shaking with pleasure I started to ease in the first few inches. It was different to anything I'd ever experienced, the lube helped but it was stretching my little pussy to it's limit. I kept going and got to about 6 inches before I started shivering, my legs were shaking and I could now see why some women find sex so appealing. Scotts tiny dick had never reached so deep or made my feel so full before. As I tried to get the last few inches in I felt a quake all through my body. I began slowly pushing it in and out until I was taking almost the full thing. I sped up and a pulsing orgasm started working it's way though my body. I wanted, no needed to go faster and pound it harder but found that's not any easy thing to do to yourself. After I came, I laid on the bed for a good 15 minutes taking in what I just experienced. I was absolutely going to be doing this regularly, my libido was crying out for more. I hid it somewhere I knew it wouldn't be found, in one of my shoe boxes and looked forward to the next time I could take it out.

Seeing the results I was getting form the gym, I think my husband was starting to feel the pressure to lose weight too. I thought it would be a good idea for him to come to the bootcamp class so he couldn't just pretend he was doing something and just be lazy like usual. He said he wanted to go on a day I wasn't there so I wouldn't see how pathetic he was from not exercising for so long. I laughed and said fine but he'd have to let me know how it went. When he got back he mentioned that it was almost all women and really not something for him. He needed something a little less brutal that wouldn't kill him. I suggested he start with the normal gym area and build his fitness up before trying again.

On the same evening Scott and I went for a night out to a party. He loved taking me out to get drunk because he knew that's when I get horny and like to have sex. Unfortunately I got way too drunk and blacked out the second we got home. I did have an incredibly vivid dream of Bradley from the gym pounding my pussy with his monster until I orgasmed in a messy heap. The dream felt quite real and in the morning I found my underwear on the floor and the sheets wet again. Scott woke up and was buzzing about the night, I confessed I couldn't remember anything which seemed to disappoint him a bit and he didn't say anymore. He asked me about the dildo and I told him I'd gotten rid of it. This wasn't strictly a lie as I had disposed of the 6.5" one but what he didn't know is that I'd upgraded it.

A few weeks later I went on a gym night out with the girls but soon gravitated towards Brad. We chatted all night and as the evening went on he mentioned he was married, I told him I was too. We didn't say much more about our partners other than their names and then changed the subject to something more interesting. He confessed that he had a little crush on me as I was the only woman to ever keep up with him. I was really flattered by this and the more I drank, the more I couldn't stop thinking about that bulge. When I was very drunk I let slip that I sometimes stare at his package and asked if he stuffs something down there to impress. He laughed and told me it was all natural. I took his phone from him, put my number in then told him to send me a dick pick to prove it. He smiled and said he might if it would stop me talking about it. The rest of the night was a bit of a blur until my taxi arrived and I went home.

My head was still a bit foggy from the alcohol when I woke, I glanced down at my phone and saw a message from an unknown contact. 'Hi hope you got home ok, looking forward to the next gym session. Please don't stare :)' Oh Shit! I remembered what I'd said, I quickly tagged the contact as Beth (one of the girls from the gym) and replied with a blushing emoji. Over the next few days we messaged quite a lot, I had to be careful not to let Scott see but I really enjoyed our chats. It got a bit flirty a few times and he actually sent me a photo of his bulge in underwear. Wow it looked impressive but I still thought he had something stuffed in there to enhance the look. At one gym session Bradley asked if I really wanted a dick pic, I laughed and I told him I was just a curious girl.

Scott had been trying to get me in the mood for sex lately and to be honest I didn't see the point, I just couldn't see how I could fake enjoying it after what I had experienced lately so made excuses about headaches and pretended to be a sleep a bit more often.

A few days later I woke up to see I'd missed some messages from Bradley. The first was him asking me if I was up, which I clearly wasn't when he messaged. The second made my heart stop for a second, he'd taken the photo I'd drunkenly asked for. A full colour, unclothed picture of his cock with a ruler next to it. I couldn't believe the size of it, it almost looked edited. I was sure it was bigger than the dildo I'd bought. I'd seen ones like this in the porn I'd watched but was now looking at a picture of something I'd been lusting over for months. I quickly moved the photo into a hidden folder. Over the course of the day must have looked at it about a hundred times. What a beast, I really wanted to see it in the flesh but knew that would never happen. He was married and so was I, that would be crossing the line.

I knew in the next gym session I'd be just gawping at his cock all the way through so decided to give him something to look at too. My bum is my best feature by far and instead of my usual baggy shorts I put on some tight lycra shorts which clung to my every curve. I knew would be hard for him not to look at me wearing those. When I arrived I saw Brad with a sheepish look on his face, I smiled wide and said 'nice' which seemed to relax him a bit. He told me I looked amazing in my outfit and it was going to hard to concentrate on the workout today, which made me beam. After our sweaty, exhausting session he suggested we go for a drink sometime to chat. I agreed and picked a date the following week when I knew Scott was out of town on business. The plan was to get drunk with stimulating company, then go home after and play with my dildo while fantasising about him.

I'm not sure why but on the day I was going out I started tidying the house more than usual, I think I was just nervous and really looking forward to my 'date'. Scott asked me what I was up to tonight and I lied saying Beth was coming over for a girls night, it would give me an excuse for being hungover. He left for his trip and I started getting ready. I put on a super sexy outfit as I really wanted to see if Bradley would lust after me like I did over him. This would be the ultimate turn on for me just to see his reaction.

We met at a bar in town and started drinking, it wasn't long before our flirty conversation turned to sex. I asked Bradley how many women he'd slept with to which he replied 5, which I remember thinking sounded highly unlikely with the way he looked. When it was his turn to ask a question, he asked what the biggest cock I'd ever had was. I explained that I'd only ever slept with my husband who wasn't particularly blessed down there. We had a great night and I was on my way to being quite drunk so I suggested it was time to go home.

We shared a taxi which arrived at my house first. When it stopped I found myself asking if he wanted to come in for one last drink, he agreed and in we went. I'm not sure what had come over me but I had butterflies in my stomach at the way things were going. We got another drink and Brad asked for the grand tour. As I took him round the house I was really pleased I'd cleaned the place earlier on. He asked if he could see the bedroom, I giggled and agreed but told him I didn't want any funny business. He glanced around the room and sat on the bed before asking me if I liked the photo he'd sent. I said yes but that I thought it looked photoshopped. He said he would show me the real thing if I helped him get it ready by flashing a bit of skin. I giggled again and said OK, on the condition it wouldn't go further than that. He nodded. I pulled the top of my dress down to reveal my sexy red bra and unclipped it letting it drop to the floor. Brad smiled wickedly at my bare breasts and started to unbutton his fly. He pulled down his trousers and underwear and there it was In full glory, the monster cock. It was so big I couldn't help but comment on it's size and how I didn't think my hands could even fit around it. Bradley encouraged me to give it a try. I reached out like in my dream but this time grabbed the thick hard shaft. For a moment I just held it and marvelled at the sheer size. He stood up and gently laid me down on the bed, my heart started racing again. He put the TV on and turned to an R&B music channel which made me relax a bit. He pulled off my panties, spread my legs and buried his head into my pussy. I've never had someone give me oral sex before and I can honestly say it blew my mind. I shivered and shook as the first orgasm rushed through my body, it was much stronger than any I'd had with the toys. When I'd calmed down he manoeuvred himself so his hips were between my legs and he started rubbing the huge head of his cock against my clit. He said he would take it slow if I'd never had a big one before. I've never been so turned on in all my life and blurted out for him to stuff my tiny pussy. I have no idea where those words came from but he seemed to like them a lot. As he pushed in the tip, my head went light and I thought I would pass out. I regained my senses for a few seconds before he continued going deeper and deeper. The feeling was incredible and I could feel my body pulsing with pleasure. He started to thrust in and out, I was stretched to the limit but it wasn't painful just sheer ecstasy. As he started speeding up I urged him to give me all of his monster cock. He rammed it in completely and it hit something inside of me that felt quite uncomfortable. He apologised and said he obviously couldn't go that deep on me. He started thrusting again, an expert with that huge thing, every stroke made my body tingle from head to toe. I think I orgasmed 3 or 4 times during the session, I'd lost count and in the end I couldn't see properly. I'd been well and truly railed.

The night finished with us lying on the bed in an embrace. He told me he felt guilty for cheating on his wife but said our night or passion was one of the best he'd ever had. I also felt massively guilty, having the best sex of my life, in the bed my husband and I share left me with mixed feelings. I never wanted to do this to Scott and told Bradley I thought this would be best as a one time thing so it didn't ruin both our marriages. He agreed and I felt a bit better that we were in the same situation, knowing neither of us were going to mention this to anyone.

I was pleased to see Scott when he returned and had promised myself I was going to try harder to enjoy our sex life. After a week Scott admitted he knew about the big dildo and said I'd told him to use it on me on that drunken night. He said he'd like to use it on me once a month if I was ok with it, which I really liked the idea of. Being able to get my big cock fix with no guilt attached. I'd probably be thinking of Brad and our incredible night but as long as I didn't scream out his name I knew Scott would do his best to please me as much as he could.