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The Experiment

As you probably already figured it out – the decision for Seth to stay was sealed right after our close introduction. From this point, I was officially – well half officially, considering I could tell absolutely no one about the fact – I was in a relationship. And it wasn't some average relationship either. It was a triangle. Something which I never considered before in my life. And to add spice to it – my first partner Bruno, was a crossbreed of a human and a wolf, who claimed to be the result of an ancient genetic experiment. He didn't want to bring up any details and always cut the conversation had I tried to ask about anything else. Well as to the second partner I shared, his name was Seth. But instead of being any crossbreed at all he was in fact a pure breed of a German Shepherd. One of the biggest German Shepherds I have ever seen in my life, and in fact with the size, he came with a rather considerable sexual appetite.

Bruno did keep his end of the bargain even though I never expected it of him, as Seth turned out to be a very pleasant companion. I actually never had to take care of any of Seth's needs as Bruno had promised initially. Of course with the exception of being his sexual mate. Other than that, Bruno took care of his food, and made sure he had enough exercise apart from intense fucking of my ass, that he never had a chance to feel cramped or bored at my small apartment.

I have to admit that it was the best relationship I could ever imagine for myself. We have spent every free moment when I wasn't at work, or didn't need to attend any important business in the town. In fact, I savoured every single moment that I spent with both of them, cherishing their presence and affection they brought me and returned it in plentiful amounts. It wasn't only sex. We did almost everything together. If Seth wasn't running around in the nearby forest, we slept together in my bed, as close to each other as it was possible, we ate together and carried out our lives in a very unusual but satisfied trio. I watched movies and played my favourite games with Bruno, while Seth usually watched or slept.

We talked for hours or simply stayed quiet for a change keeping each other company. Seth from obvious reasons wasn't the one for games or movies – though he seemed to enjoy those which involved other animals – and yet he was still able to create bond between the two of us, that seemed to get stronger every day. Despite the fact that Bruno kept him exercised, I used to take Seth for long walks, and talk to him about everything that I wanted. Of course I never expected any response – unlike Bruno he was a pure animal after all and most likely had not much interest or care for my problems at work, and yet, every time I wanted to say something that was burdening me, he constantly kept his eyes on me, and continued to walk by my side in silence and somehow I felt as if he cared for me and really listened. Not about the problems I described, as he hardly could have any comprehension of what I was talking about, but he did seem to care about my feelings. And when he sensed that I was feeling down, or simply felt sad, he did everything a dog could do to keep his master distracted. Of course I wasn't his master and he wasn't actually my dog. To be completely honest when I admitted in my head that he was actually my life partner, my boyfriend, it made my heart pound harder as these words – even if only spoken in my head – actually meant something real.

During these walks with Seth, people constantly admired his peaceful behaviour, and often said how good of a dog trainer I must have been, considering that he was always keeping close to me and never expressed any interest in other dogs, birds or even cats, we passed. They didn't seem to notice that I have never called him over or didn't need to wait for him as he sniffed something interesting – as dogs have often in their nature. He was hardly even behaving like a typical dog, and because he was so calm and quiet, no one was bothered that I he doesn't have a collar, leash or didn't have his muzzle covered in case he would try to bite. And he never did.

One other thing that kept him apart from typical dogs – at least from what I could expect – was that he never gave any hint that we were actually sexual partners. As if he understood that such behaviour is socially unacceptable, and that by doing so, he would compromise our relationship and bring trouble on both me and Bruno. I read that it was very difficult to teach a dog to see the difference between mounting his master in private and in public, and it wasn't easy to make dogs understand when it was even okay to hump, and when it might not be the best idea in the world. Well, with Seth I had no problems of the sort. More and more I have wondered what made him so special in so many ways. There were times, when I looked into his golden-brown eyes, and felt that there was real intelligence behind them. One that perfectly understood the nature of our relationship, and that could also sense and comprehend my feelings.

He was also very observant. He watched how I interacted with Bruno, and quickly realized what pleases me more in the terms of physical contact – and I'm not ever talking about having sex. If we had the chance, he would come up to me, put his muzzle next to my cheek, and stayed silent as I put my arms around him, and allowed me to hold him close to me for as long as I needed. Sometimes he would even hug me first. He would stand in front of me, and put his strong, large paws on my arms, and put the side of his large head beside my own. He expected nothing in return. He was so affectionate, he quickly managed to steal my heart in the same way in which I also fell for Bruno.

You probably wonder if living in such triangle ever involved having sex together. Well, first of all, I would like to confirm: we had sex very, very often. In fact, there wasn't a day when both of them didn't fuck my butt at least two times – each. Their canine cocks kept penetrating my innards, and left loads and loads of their mixed cum inside of me. Some of which was starting to be absorbed by my body. That caused me some trouble on several occasions, but I will explain this another time. You'll ask: what about sex with both of them at the same time?

Well, actually Bruno brought up that idea the other day, as we were all at my apartment, still in my bed. Of course the bed was ours now, but let's not get into semantics. I laid on Bruno, while Seth was laying on his side, just next to us. “Ever thought of taking both of us at the same time?" – Bruno asked, while I was gently rubbing Seth's ears. I looked back at him with a surprised expression, and didn't know what to say. I wasn't sure that such thing would be even possible. After all, Seth required me to be positioned in a certain way which suited his anatomy and the way he was used to have sex, and secondly they were both rather large in the terms of their huge dicks. Besides, if they both got tied to me, it would most likely be incredibly dangerous. “Would that be even remotely safe?" – I responded, moving off to the side, while Seth got up and went up to his bowl to drink some water. Bruno smiled and put his hand on my cheek. “Come on, we'd both be gentle with you. And if you won't like it, we don't have to do it again" – he rubbed my cheek with his hand and slowly moved his wolf face to mine and offered a long, passionate kiss. I felt his warm breath, and his large, strong tongue with which he slid across the inside of my mouth. His sweet saliva poured in generous amounts, as he licked my teeth and my own tongue, and gosh did that get me aroused. He wasn't even trying to hide his growing erection, as his large, red tip slid out of its sheath, already spreading his pre-cum from the incoming excitement in great amounts. I loved that sight, and I lowered myself as we parted our lips to lick it off his belly. I took his tip into my mouth and sucked it for a second or two, allowing more of the warm, salty fluid to flow up to my throat. I immediately swallowed it all, and licked him some more, forcing his cock to intensify the leakage.

“So what would you say? Want to try? I promise I'll be gentle with you and will try to make sure not to tie with you" – he said as I finally pulled away from his growing cock. I massaged his balls with my hand as I was considering the offer, whilst Seth came back over us, and noticed that we were starting to get into business. He responded in kind and the tip of his cock also slid out as it grew in its thick, fleshy hideout. I saw him almost immediately dripping with his pre-cum, leaving spills on the floor, and the look in his eyes actually got me convinced. The thought of having two canine cocks lodged deep inside me was a very strong turn on, and I simply couldn't refuse any of my boys. Bruno smiled kindly, and offered for me to sit on his growing dick. I followed his instructions, as he lowered himself on the bed, and quickly slid his penis inside my ass. As it was slick and very slippery from the incoming fluid which he spread in large quantities, it wasn't hard to ease himself into my body, and he continued slowly to go deeper and deeper, with the constant though not to make too forceful thrusts.

The moment came for Seth, as Bruno signalled him to hop onto the bed. Seth looked at me, as I moved my face towards him. He seemed as though he was checking whether it was okay with me to fuck me as well. Even though I was in a way a substitute of a bitch to him, he apparently cared whether I approve of this idea or not. I smiled and also encouraged him, and he didn't need more invitations. He jumped on the bed, sniffed at my back, carefully watching the penetration I received from Bruno, and when he felt ready, he walked over us, and grabbed me in the usual way, placing his lowering sheath in the appropriate position. As usual he didn't require any guidance from me or Bruno, and he went into normal fucking pace very easily. I felt their slippery and growing cocks move inside me, poking at my ass and stretching my ass ring, and did that feel good. Bruno made sure he is moving gently and at a constant pace, but Seth apparently let loose his every restraint, and went into full fucking frenzy mode, where he humped me hard, fast and incredibly deep. He was probably very horny that day, as he seemed to do everything he could to immediately tie with me. He did not seem to mind, that he wasn't the only male that was inside me at that moment.

After a couple of minutes, I felt his growing knot going in and out, and it started to stretch me good. Bruno moved his face close to my ear and whispered – “Can we both tie with you?" – his low voice was intense and very passionate. He was also having fun and obviously wanted to fuck me all the way as Seth's behaviour must have encouraged him. I was so turned on, and felt so full of their dog dicks, that I probably didn't think straight. “Go for it" – I whispered back, and he immediately picked up his pace as well. He licked my ear, and kept kissing my neck, as Seth kept panting deeply on my other side, and didn't stop for a moment in his desperate attempts in inserting his knot into my butt. Then it happened. Their both dicks went in full lengths, and started growing even more rapidly. Their knots swelled behind my ass entrance, as I felt again as if I had a real balloon showed up there, and now someone decided to fill it up with some more air.

The first feeling was no different than when either of them tied with me, as their dicks got bigger and bigger, but after couple of more seconds, the pleasure and bliss subsided and pain took over. Their large knots swelled next to each other, both deeply lodged in my ass, and both of them started their orgasms. The feeling of having two males who had just started filling me up with their sperm, might have been an incredible experience if it wasn't for one thing. I wasn't ready for both of their dicks. They were pressed so tightly to each other, that I felt them pulsing in turns, as they kept pumping me up with their seed, and continued to swell even more, leaving less and less room in my intestines. I was ready to scream, while they were pleasured by my aching body, and I realized that we might have went too far.

Then my ass decided to have some say in this. You know that feeling when you just can't hold any longer and you need to release whatever is inside? Well here it came to me. My ass muscles on the inside swelled around the two dog dicks shoved and locked deep inside me with a tight ring, and started desperate and yet futile attempts to push them both out. As my spinster was too small and too tight, and their knots were already too big to actually be able to pass through my tight opening, it started to hurt even more than it already has.

I cried in panic as I wasn't ready for such amount of pain, but I had nothing to say about this. Any my ass just worsened my situation. The constant attempts to force the pulsating dicks out of me, made them stimulated even more, intensifying their simultaneous orgasms and making their penises even thicker and harder. And there was no way I could stop. I tried to squeeze my ass to let it know that I want to keep the two large and heavy intruders inside, and for couple of minutes it even helped, but my ass wasn't easily fooled. It wanted them out, and I had no power over the process. Lucky enough, after ten more minutes, my body actually gave up, but my ass was so sore after what had just happened, I couldn't feel anything more than intense pain inside. And there was still so much time to wait until they would release me. There was no choice but to wait it out. It wasn't 30 more minutes before I felt that they stopped filling me up with their sperm. And it was awfully deep inside of me. I could feel the hot and heavy load within my innards, flowing further up my digestive system, trying to make sure I was well impregnated.

Bruno was obviously concerned. While I tried not to scream, it was very hard to stay still during the process, and when his orgasm finally subsided, and allowed him to think more clearly, he tried to comfort me as much as he could. He even tried to push harder into me at one point, so that their knots would not have to be lodged next to each other, and that finally eased the remaining wait, until they were ready to leave. Seth also took the advantage of this change, and moved off me, to turn himself and I felt as his thick cock also move closer to the exit. That gave me enough room for me to withstand it even more easily, and from this point I actually felt the returning pleasure as my prostate was being squeezed with their both dicks.

When I finally had some pleasure out of this little experiment, and came on Bruno's belly, I felt that Seth was ready to leave. He wasn't even remotely smaller, but the space he got from when Bruno had pushed harder inside, prompted him to try and remove his knot from me. He pulled hard, and it hurt as always when he did it but it was better than when my ass tried to push them out, so I welcomed the feeling. Bruno explained to me one time, that the sensation of having their knots squeezed by a tight space was in fact the most pleasant thing in the entire mating process, and that was the reason why Bruno and Seth tended to pull on me, rather than to wait for their cocks to shrink enough and to slide out on their own. And when the large knot had finally slid out, Bruno also took the advantage, and pulled on me as well. His knot got through my ass entrance just as Seth's dick started to move further outside. I felt stretched well, but it was a pleasant feeling for a change, and I moaned loudly, when they slowly forced their monstrously large and thick dog cocks out of my body.

That brought me over the edge, and while my insides still were sore, I came for the second time, as that happened. Bruno asked me to look behind me, and I saw that Seth still stood above my ass, with his large, heavy dick hanging low between his hind legs, and just below his huge balls, while Bruno kept gently slapping at it with his own manhood. The view was so hot, that I immediately moved off him and positioned myself close to his crotch, and started licking both dog dicks, as they continued to drip with final amounts of their cum. They touched each other, as I sucked them both in turns and their view was incredibly hot. At one moment Bruno slid under Seth so that their dicks were aligned with each other, and asked Seth to turn around, and sit on his crotch. The dog immediately did what he was asked for, and that resulted in Seth's cock was once again laying on top of Bruno's dick, making them pointing the same direction. I put my face over there and sucked on both of them at the same time. The final drops of Bruno's thick and white along with Seth's salty, watery and metallic in taste sperm filled my mouth, and I immediately swallowed the entire amount. After all I had to admit that the entire encounter wasn't so bad.

In fact, because I felt so stretched, I decided to practice this a bit more, and offered my ass to both of them once again. Though I was still sore after what happened, the difference this time was – nothing worse could have happened now and because I was already very loose after the previous penetration, I knew that holding both their cocks in me would be a lot easier. Bruno was hesitant, but I promised that I will not blame him if that turns into another painful sexual adventure, and not to ask for this if it happens to be so. He looked at Seth as if he was consulting him, and the dog immediately stood up presenting his already prepared dick, hanging low in his thick sheath. “Alright, then. If you say you want this I guess we can't deprive you of our dicks" – he pretended to make a very tough decision, but his already growing penis was a visual proof that it wasn't so hard to agree upon the offer.

We repeated the previous steps, and taught by the previous encounter, Bruno also made efforts to push his cock even deeper than usually, to be sure that Seth will have enough room up my ass, to be able to normally tie with me. We were hopeful that this would cause me less amount of pain than it did before. They both fucked me hard and I was already moaning from the growing tightness in my asshole. Seth was intense and very focused on making sure that he will successfully impregnate my intestines, while Bruno tried to divide his attention between pleasure and his motion control. He wanted to make sure that he will not cause me any unnecessary pain, and that he will be able to intervene in case something went wrong.

I was right. Because the previous attempt got me stretched nicely, when they finally inserted their knots behind by entrance, and started to swell it felt a lot easier. Bruno bucked against my ass even deeper than he used to, and that gave Seth enough room, that even when his knot got to its full size, I didn't feel as if I was about to be ripped in half. When I felt them flooding me with their semen once more, and as their cocks that were tightly pressed against each other finally reached their max length and thickness, I actually felt good. The amount of sperm that has been deposited into me was astonishing, and I literally felt as my intestines were forced to stretch because of the copious volumes of it that came after each pulse of their swollen dicks. It hurt – of course and I won't hide that. But the fact that the pain this time was caused by sperm that was produced by their large testicles, I so adored in licking, sucking and massaging, and by their enormously large dicks, made me experience an incredible orgasm. I came once, than for the second time, and two or three more times whilst we were locked together. I honestly lost track of things, and I'm not even sure how long my both males were knotted to me, and I didn't much care. I felt the insane flood inside me – I had now 4 loads of sperm, planted into my innards, and if that wasn't enough – my ass was full with two large, dicks. One which belonged to my wolf-man Bruno, and the second to my beloved boyfriend dog – Seth.

When it was time to leave my body, he was the first to try and pull out. Bruno tried to make sure that he was deep enough in me, that the dog had just the right amount of space to try, but he most likely lost a good grip and support under his feet, and instead, he also pulled on me, forcing his knot into my hole right in the very second, as Seth started pushing though. I gasped air, as I felt a sharp pain. I was so close to have my ass ripped by their both knots pushing through me at the same time, but apparently the dog hearing my reaction, decided to pull on me even harder. While it hurt as the devil, it actually helped to squeeze through, before the pain became too unbearable and started sliding the rest of his dick outside. Bruno kept whispering his apologies for not holding his hips in the right position, but I told him that it was fine, as long as no damage was done. “I don't know what happened. I was holding you firmly, I'm not sure why I lost my grip" – he continued to apologise, as his dick slowly slid out of my intestines. I was so stretched after this, that I felt the sperm they both left in me, would soon start flowing from me like a river. I didn't want that. I wanted their cum to stay. “I told you it's fine" – I said, as I felt as the hot mix of their seed ready to reach my entrance. “Help me hold it inside. I can't squeeze myself enough to block it" – I asked, still lying on top of him. He reached his paw under me, and checked if I was really so stretched, or perhaps I didn't feel my ass properly as it was sore after the entire process.

“Seth, come over here” – he whispered, as the dog stood close, still curiously watching my clenching ass, whilst I desperately tried to hold their generous loads inside. He came over and turned his rear towards me. Bruno grabbed his still fully swollen dick, and positioned it against my opening. “Ready baby?” – he asked me softly, and I nodded, pushing my ass towards Seth's incoming manhood. Bruno gently put his dick back inside me, as the dog moved closer, and he finally squeezed the still hard knot through my spinster. It hurt as the muscles were sore after what had just happened, but I managed to withstand this, until the dog was once more tied to me, blocking their cum from flowing out of my ass. Bruno put his still hard cock next to my ass entrance, where we were locked together, and lied under me, calmly watching as I moaned from the sensation of Seth's knot still firmly pressed against my intestines. “Let's not try this too often” – he offered, as I felt the warmth of the dog's dick deep inside me. Bruno pushing him through my ass actually made Seth swell a little more, and he didn't had a problem in staying inside, and I welcomed this state. I loved them both. Not just for the sex, and because they had canine features – though that was one of the advantages of our sexual triangle. I loved them because they understood me so well.

We tried the double fucking every now and then, but both Seth and Bruno were incredibly gentle when we did it, and they never ever insisted on it, unless the offer to repeat this little adventure came from me. We had enough sex between ourselves, that the rare occasions when I allowed my both males to impregnate my ass at the same time, were more than enough for all of us, and mostly we stayed satisfied with only one of them deeply tied to me at the same time, while I could still service the other one sucking his offered dick. And there was so much ahead of me...