07

Chapter 1

My girlfriend, Kate, and I had been dating for about a year when she first began to discover her kinks. She had dated a few guys before me but nothing long term or as serious as our relationship. We were both 28, and neither of us had much sexual experience despite having very high sex drives. She was always eager to try new things, and loved watching porn. She called it "doing research". Kate would often show me videos of stuff she wanted to try, and I was always more than happy to attempt the various positions or role-play scenarios she asked me to attempt. Our sex life was great, or so I thought.

One evening Kate brought up the idea of me tying her up. She wanted me to tie her hands and feet to the bed posts and "spank her ass red". This shocked me a bit. We had never tried and bondage or bdsm before, and not only that, she tended to be the more in-control one in the bedroom. I was taken aback by her sudden desire to be helpless and submissive.

"Are you sure?" I asked, "I wouldn't want to hurt you."

Kate rolled her eyes and smiled, "Don't worry baby, I'd be more worried about these butt muscles hurting your hand." She joked, taking my hand and wrapping it around her, placing it on her firm, thick ass.

I laughed, agreeing that her ass was getting tighter and thicker by the week. We had both recently joined a gym. As a skinny guy, I wanted to put on some muscle and finally be able to fill out my shirts. In the last few months I had gone from 5'9" 140 lbs to about 155. I was feeling amazing, and more confident than ever.

Kate had joined the gym with me but she had much less work to do. Her body was already perfect in my eyes, but she would tag along and do butt workouts from some instagram accounts she follows while I lifted. At 5'7" she liked to tease me, saying that if I keep working out maybe I'll finally be bigger than her. I would always stand up taller to make sure she knew I wasn't shorter than her, but she would jokingly tell me that I'm lucky she isn't wearing heels. One time I joked back that she was lucky I wasn't wearing heels too. Making her laugh has always been the best part of our relationship.

So I tied Kate to the bed. Her hands tied overhead and her feet tied together. She lay face down on the bed giving me a perfect view of her amazing ass. I remember thinking how lucky I was to be able to touch her ass.

Kate wiggled her butt almost tauntingly, telling me, "do your worst baby!" I could hear her grinning into the pillow. I thought to myself how she seemed to be enjoying this more than I'd have guessed.

I straddled her legs, giving me a good angle of attack on her perfect butt. My hand swung up above my head and came smacking down. Not too hard, but hard enough to make her firm butt cheeks jiggle, and leave a soft pink hand print. My hand stung a bit, but it wasn't too bad.

Kate giggled, "hmm you can do better than that baby, what are you doing in the gym anyway?"

I laughed and said, "well there's no spanking machine! But since you asked for it!"

My hand came down again, harder this time, leaving a more red hand print than before. This time she clenched her butt cheeks right as my hand hit and it stung much more than the first slap. "Thats all you got big boy?" She said, this time I could've sworn there was a hint of actual disappointment in her voice, despite the fact I could still hear her smile into the pillow. I laughed nervously. I rubbed my hand to reduce the stinging and spanked her again, this time I put everything I had into it. Again she clenched her ass muscles hard and my hand bounced off them, making a clear and loud smacking sound. My hand was now legitimately hurting, and it was almost redder than her ass cheeks. I started realizing Kate may have been right about her ass winning this battle.

Kate giggled again, "ohh I kinda felt that one baby that's more like it." And she started wiggling her ass pushing it up towards me, almost begging for more. I rubbed my palm on my leg to calm down the stinging sensation, and laugh nervously.

"Damn babe, your ass is so firm now, that work is paying off!" I smacked her other cheek with my left hand to give my right a break, but it wasn't nearly as powerful. Kate let out a giggle that evolved into a bit of a sigh.

"C'mon, harder!"

I used the right hand again. Smacking her ass as hard as I could three more times. By now, only a few spanks in I realized I wasn't cut out for this. Kate, however, is just getting started. "Yes, oh my god yes baby, show me who's boss!" She taunts, wiggling her butt after every slap. I can tell she's getting wet. I begin to get frustrated, and my hand is starting to lose sensation. I blow on it to cool it down as it's throbbing.

I spank her a few more times but she can tell that I'm losing power. After about a minute I give up. "Babe I don't think I can keep going, my hand is actually numb." I start to blush a bit realizing her off the cuff joke was actually coming true.

Kate laughed softly but then sighed in frustration. "Ughhh fine, it's okay baby. Do you want to use some of my hand cream? Untie me and I'll grab it."

So I removed the restraints and she got up, walking her perfect, red ass to the bathroom. She came back and tossed the hand cream to me saying "will you be ready to go again soon?" I grimaced as I rubbed my hand.

"I don't think so baby, can we just have regular sex? I'm not sure this is for me, sorry." I looked up at her, appreciating her sexy body.

She rolled her eyes, clearly annoyed. "Fine I guess." And pushed me onto my back climbing on top of my now rock hard cock.

Kate rode me for about 3 minutes until I uncontrollably came. She seems proud of herself for getting me off that fast but I could tell she wasn't done herself. "I have an idea" she said, and went to grab her phone.

As she came back she was typing something in her phone, barely noticing me laying on the bed. Suddenly she smiled as if finding something, and climbed on top of me, facing my feet. Kate backed her ass up into my face and with very little warning plopped down on my face. I was taken aback long enough to forget that I had just cum inside her. I quickly realized when I felt her warm wet pussy grinding on my mouth, and tasted my hot cum as she started finding her rhythm.

At first I was a bit disgusted but I felt like I owed her an orgasm at the very least, considering her first idea didn't go as planned. So I stuck my tongue out and flattened it giving her something to ride and cum on.

Although her thick ass cheeks covered my face, I could hear some sounds coming from her phone. It was quiet but it sounded like smacking and moaning. At first I thought she was watching regular porn, but then I heard a man's voice say, "be a good girl for Master, slut." I realized Kate was watching some bdsm porn or something similar. As if on cue, she started grinding on my face harder and faster, her wet pussy rubbing my tongue and haphazardly grinding all over my face. Smearing our combined juices all over my chin and nose. I heard the girl in the video breathily say "thank you Sir", and just like that, my girlfriend started quivering on my face, putting her full weight on her ass as she smothered me and came. It felt like she was cumming for an eternity.

Kate eventually collapsed, rolling off my face. And looked over at me with a tired but satisfied look on her face. Her eyes glazed over and a grin. "Ughh that was hot, thanks babe!" She said. I was pretty relieved I had made her cum despite not being able to follow through with the bondage she had initially wanted.

"So what was that you were watching?" I asked, with a face full of my cum and hers. She chuckled and hesitated.

Kate looked at me for a moment and laughed again, "ughhh don't worry about it baby, you did your part!" She said kindly, as though trying to avoid talking about it.

"Are you sure? It seemed like you really loved it." I said curious to see what she was watching.

"It's nothing crazy it was just something on Pornhub, baby, besides you might not be cut out for it." She said playfully. "But that's okay," she said, leaning in to kiss me, "as long as you have this tongue..." she trailed off as we made out for a bit, ending with her biting my tongue with a playful smirk. As she got up off the bed I watched her walk away, the red hand prints I left on her ass cheeks already almost faded, I was reminded of my hand still throbbing.

I didn't know it yet I would look back on this night as the night that started it all.

Chapter 2

Over the next several weeks, I started noticing some changes from Kate. She was still very playful and friendly, and by all accounts our relationship was great. But our sex life seemed off. On the surface it was good, we still had sex nearly every day, but Kate seemed less and less interested in normal sex. She kept putting my hands on her neck, or telling me to go faster or harder. It was as though she craved being used and manhandled. Although I had been getting stronger, I wasn't quite big enough to easily toss her around and it felt like Kate was beginning to notice.

At the same time, Kate was spending more and more time in the shower, and in our bedroom alone. Looking back it was obvious, but at the time I didn't realize how much she was masturbating and watching porn by herself.

It wasn't all bad though. We kept going to the gym consistently, and both continued to see great results. I was now up to 160 lbs, and Kate's ass was bigger and firmer than ever. And her confidence had never been higher. When we first began our gym journey, she would dress rather conservatively, and get uncomfortable if the gym was busy. But now she was wearing form fitting shorts and sports bras, regardless of how busy the gym was. I would often catch myself staring at her as she did deadlifts or kick backs, and caught a couple other guys doing the same. I couldn't blame them, she looked amazing. I told her I was proud of her and that I was so attracted to her. She blushed and kissed me hard and deep.

Our gym experience was entirely positive, but mostly uneventful. That was until we met Jordan and Claire.

Kate was working out one day and struck up a conversation with Claire over a piece of equipment the both needed. Seeing as they both had phenomenal asses and clearly similar goals, they quickly became friends and gym partners. This was nice for me, since our schedules didn't always allow us to work out at the same time, so if I couldn't make it, Kate and Claire would go together.

I met Jordan in the locker room, and although I've never been into guys, I couldn't help but marvel at his physique. The man was 6'3 and must've been at least 250 lbs of all muscle. And despite him actually being a few years younger than me at 25, he dwarfed me.

One day, a few days after Kate met Claire, I walked into the locker room and looked around for an empty locker. It was somewhat busy but there was one near the end of the locker room no one had taken yet. Right as I was about to open it, a deep voice from behind me said, "hey that's my locker!" I turned around to see Jordan's huge frame walking towards me. I was initially annoyed but knew better than to start a fight with this guy. Jordan was waking back from the showers, and was wearing nothing but a towel. He was so big it looked like a wash cloth hanging loosely around his waste.

"Umm sorry man, didn't see any other open ones." I said sheepishly.

He grinned cockily, like someone used to getting what he wanted. "That one down there is open, but this one's mine." He said. He smirked as I bent down and got on my knees to put my bag in a small foot locker on the bottom level. As I got up I realized he was using a different locker, not even though one I wanted to use. He chuckled as if proud of himself, "haha just kidding man this one is all yours if you want it!" And clapped me on the back. "You're Kate's boyfriend right?"

Annoyed at being bullied by a guy I had never met, I grabbed my stuff and put it in the bigger locker. "Ummm yeah how did you know that?" I asked, genuinely curious.

"Oh my friend Claire told me about you guys." He said, much friendlier now that he had played his childish joke.

"Oh you must be her boyfriend Dan then?" I asked extending my hand to meet his.

"No but I know him too!" He said with a knowing smile, and reached out to shake my hand, in doing so his towel fell down to the floor revealing the biggest cock I had ever seen. Flaccid it was at least as big as my fully hard dick, meaning it was over 5 inches soft. He didn't seem too concerned and chuckled again, as though it was a prank. "Whoops sorry about that haha! I've been saying they need bigger towels!" He grinned as he didn't let go of my hand with his firm handshake. I remember thinking he must be a competing bodybuilder since his whole body was shaved perfectly smooth, making him look like he was chiseled from marble.

"Umm haha how do you know Claire and Dan then?" I asked. Trying and failing to ignore the huge naked man in front of me. I must have been turning red.

"Oh I've been training Claire and Dan for a while." Pausing slightly before the word training. "I'm Jordan." He said. Finally releasing my hand.

"Kevin" I responded. Glad to be free of his vice grip. As he turned around to pick up his towel I thought, of course he trains Claire his butt cheeks are even bigger than hers, as he bent down I couldn't help but glance at his smooth muscular ass. Although every muscle on his body was huge and Claire and Kate only focused on ass. "So you must be a trainer here then?" I asked, awkwardly, sitting down to tie my shoes.

Jordan turned around and I regretted my decision to sit down to tie my shoes as his huge cock now flopped only a foot or two away from my head. He seemed not to notice and said "nah I make way too much money at my day job for that" he chuckled "I just like helping out my friends, ya know?"

As he said that he put a hand on my shoulder and gave it a squeeze, it must have felt tiny compared to his huge shoulders. "Wouldn't mind giving you some tips either, I specialize in... beginners."

I wanted to tell him I knew what I was doing and wasn't a beginner, I had put on 15 lbs of muscle after all. And the way he said it sounded kind of condescending, but he clearly was more experienced, and I didn't want to be rude for some reason, even though he had been rude to me a couple times already. Instead I asked him "how long have you been working with Claire's boyfriend Dan? He seen any progress?"

"Oh he's seen loads of progress." Jordan chuckled. "I'd show you some before and after pics but I'll respect his privacy." He smirked again. "Let's just say he's had at least a 40 lbs transformation in the last year. And he was in pretty damn good shape to begin with." His eyes looked like they were laughing. "What do you weigh like 150?" He asked, giving my arms another squeeze with his big hands.

"160 actually." I said almost too quickly. Jordan raised is eye brows slightly as though mildly surprised.

"No shit? Well I could all but guarantee a 30-40 lbs change in the next 6 months if you follow my instructions." He said giving my arm a playful shake. "And since you and Kate are friends of Claire's, no charge!"

Although I felt slightly emasculated I was actually quite taken aback by his generosity. And being 190-200 lbs was pretty close to my goal weight. "Wow that's pretty generous of you!" I said. "That sounds pretty extreme though, 40 lbs in 6 months?"

"Well, it involves a diet and supplement plan, but it wouldn't be anything Dan hasn't done." He said, starting to get dressed in his gym clothes, finally. Not having met Dan I was curious to hear more, but Kate had mentioned that Claire's boyfriend had gone through a pretty extreme gym transformation himself so I was intrigued. "Tell you what," he said sensing my apprehension, "how bout we work out together today? I'm in no rush!"

"Yeah I could do that!" I said, less reluctantly than I felt. I almost felt scared to disagree with Jordan.

As I followed him out onto the floor I remember being glad that Kate and Claire had worked out earlier that day, as I somehow didn't want Kate and Jordan to meet. I'm not really the jealous type, but I didn't want to take any chances. "Okay, buddy, so what we're gonna do today is just get an idea of your strength level today, just so I know what I'm working with." I nodded silently.

We walked over to the bench press. I was hoping we'd avoid this one since it's not my best. But Jordan insisted. We put 135 on the bar and I hit a few reps, about 4-5. Jordan seemed impressed. So we put my bodyweight on the bar. 160lbs. I couldn't even get the bar off my chest. No matter how many "cmon buddy's" Jordan said. I couldn't do it. I started getting annoyed as after about 10 seconds I clearly wasn't going to get it.

Jordan seemed disappointed and I couldn't tell if I was red in the face from embarrassment or from trying to push as hard as I was. "That's failure" Jordan said. "But don't worry, I want you to get used to that. Failure is a good thing." The bar was starting to make it difficult to breathe.

"Can you get this thing off of me yet?" I gasped, started to get pissed.

"In a second, this is part of the process. The more comfortable you are being trapped and stuck under the bar, the more willing to push yourself to the limit you'll be." He said, looking down at me, smirking.

I realized I was pinned, seeing as Jordan had set up the safety bars on either side, I couldn't just tip the bar to the side and escape. As this realization set in, I saw Jordan look up, and jolt his chin up in a greeting motion to a couple of girls walking past "hey Jordan!" One of them said playfully. "Fresh meat?" She asked giggling.

"Haha you could say that," he said, ignoring me at this point. "Just breaking him in, we all start somewhere." The girls laughed and kept walking, whispering to themselves.

"Can you fucking help me now??" I gasped, ready to finally be let go. Jordan looked offended.

"Hey cmon buddy, no need for that. Tell you what. If you ask nicely I'll let you go early."

I took as deep of a breath as I could to stay calm. Red in the face I muttered "Fine, can you please help this bar off me?"

Jordan chuckled and easily lifted the bar off my chest. "There, easy!" He said.

I lay on the bench gasping for air. Still annoyed at his lack of respect for my safety.

However, the rest of the workout was fairly normal, and I did actually learn quite a bit. By the end my anger had passed and I was actually feeling really good.

As we were leaving, he reaches into his bag and gives me a bottle of pills. "Here take these supplements. Don't worry they aren't steroids, but they'll definitely give you the edge. Same ones I gave Dan." I looked at the bottle. It was totally blank.

Sensing my concern Jordan comforted me "it's just some vitamins, some creatine, and a bit of protein. Perfectly safe. I take a similar version myself." That made me feel a lot better. "See you tomorrow, same time?" He said.

"Yes sir!" I said and gave him a quick salute. He laughed, driving off in his expensive looking suv. I got in my 2004 Honda civic and blasted the AC.

Chapter 3

Over the next few weeks I started seeing some very good results in the gym, and Kate was beginning to look better than most instagram fitness models. Almost every night now she would sit on my face and watch porn, bringing herself to earthshaking orgasms on my tongue.

Being a bit stronger now, I offered to try the bdsm thing again. But she politely refused, telling me she wants to do something we both like. I wasn't complaining, as far as I was concerned her ass on my face was heaven.

We got into a routine where Kate and Claire would workout in the morning and catch up, while me and Jordan would workout at night after work. It seemed to work, and Kate was enjoying having a new friend, especially since they had so much in common. Despite the two of them being such close friends I still hadn't met Dan. He was often busy with work, apparently working 70-80 hour weeks these days. But Claire joked that the extra money was nice.