Shadow is send to go after Were-Sonic and, if necessary, eliminate him. But when he does come across him, Shadow is unable to defeat him. His heat takes over and makes him submissive to the werehog. Sonic is unable to withstand the smell of a hedgehog in heat either and can't keep himself from practically ripping Shadow's clothes off and mating him, getting him pregnant with his litter in the process.
Midnight Stroll

Shadow's POV

After the continues sightings of a dangerous beast, I was send by G.U.N to check it out and, if necessary, eliminate the threat. The Commander made sure to tell me that I was to do this without getting any of the civilians hurt. As strange as they were acting, as I wasn't going to involve any of them.
That's why I decided to go at night. It was the time when there would barely be anyone outside, the time I could use the cover of the night against my advantage and the time that the threat was rumored to roam.
The only problem was, I wasn't going to have such an easy time as I thought.
Finding the target wasn't so difficult. A large, hulking monster couldn't exactly stay unnoticed for long.
'There you are.' I thought with a smirk as I quietly approached the big, fury form from behind. I planned on ambushing it and get this over and done with quickly.
It didn't matter how quiet I was. As soon as its ear twitched, I knew he had heard me.
I barely had any time to react as it turned around, lashing out at me and throwing a clawed fist my way, grabbing one of my legs, throwing me over his head and slamming me down on the hard ground of temple's entrance. If I wasn't used to getting beaten up, I would've surely heard one of my bones crack on impact.
The creature quickly retreated his paw and looked down at me. When I looked back up at him with a pained grimace, it kind off looked like he wore a shocked expression. Like he hadn't meant to attack me.
"You bastard... Chaos Spear!" I yelled before throwing a spear-like ball of energy to it. It quickly evaded my attack, jumping back.
It gave me some time to get up and prepare myself for his next move. But none came. So I decided to make the next move.
I threw another Chaos Spear, but he quickly avoided it. Gritting my teeth, I tried it again and again, but it was no use. He avoided every single one of my attacks. I growled and decided to try hand-to-hand combat.
He avoided me easily once more.
"Damnit, fight me already!" I yelled as its constant evading and his lack of fighting back was angering me. It somehow knew my way of fighting. Or maybe it was just toying with me. Either way, I didn't like it.
"Chaos Sp-" I wasn't the only one getting peeved off by this. Just as I was going to throw another Chaos Spear, the creature threw another fist at me, grabbing me and slamming down on the ground again.
"Damn you." I said as I placed my hands on my head to try and still the growing pain in my head. If it attempted to attacked, I could still kick it in the face to get off of me.
But it didn't. It didn't even try. Instead of feeling his claws or dangerous teeth scraping the fur and skin off of my body or gawn the flesh off my bones, felt something prod against my side before going to my thigh.
"What're you..." I wanted to ask as I looked down to see what he was doing. I was surprised to see his nose pressing up against me, sniffing for something instead of fighting. It wasn't violent at aswell, was it?
I sighed as his lack of violence wasn't the only thing I realised.
As much as I try to see the fun in these missions of G.U.N, there was always a time when I wanted to get them done quickly.
And that want couldn't be more present then when I was in heat.
And the fact that his nose began pressing up against somethig private didn't exactly help either.
"You smell it, don't you? Damn, I should've known it was a bad idea to do this on my own." I cursed myself for my foolishness. But as bad as the situation looked for me, I didn't exactly try to get up either. I just laid there on my left side as I let him snif me over, trying to form a good idea of what exactly it was dealing with here.
I blamed the pain I was currently in aswell as the lack of violent behaviour on his side. But deep down I knew the real reason behind my want to stay here on the hard temple floor. My heat was keeping me here. It wasn't just that I liked it sniffing me over. I liked what was sniffing such a private area of mine.
I could hardly deny it, though. This was a large, furred and muscled beast that had proven the strenght it possessed. Of course, my loins would be demanding for a taste, no matter how little it was.
The creature itself seemed to be losing itself to the scent of my heat aswell. His muzzle pushed up against my crotch as if telling me to spread my legs and give him more space. So that's what I did, lifting my right leg up and allowing it to reek between my legs aswell.
Well, it.... Judging by what I saw growing between his own two legs, I could definitely say that this was a 'he' instead.
I should be panicking at the size I watched grow, but I wasn't. Instead I was strangely enticed. Pants starting to leave as my cheeks heated up. My whole body quickly followed.
"Go.... Go gently, okay?" I asked, even though I didn't know if he could even understand one word I said.
His eyes briefly glanced at my face as I spoke, but he quickly focused back on the source of the scent. A large, clawed paw grasped my arm while he carefully bit down on the fabric of my pants with his fang and, with one hard tug, tore the article right off of my bottom.
"Geez, so impatient." I said as I pressed my legs closed.
I wanted to stay angry with him for ruining the only pair of pants I had brought along with me. But as his nose prodded against my crotch, it didn't take long before I lifted my right leg again, showing that the underwear I wore was soaked.
My target seemed to like that quite a bit.
He let go of my arm, only to grab my right leg and throwing it over his left thigh, pulling me closer in the process. I began to feel nervous as I felt the tip brush against my still covered nether region. I wondered if I could take such a thing inside, but those thoughts were quickly pushed aside by the want to try and see.
The beast used the same technique with his fang to rip off my panties while I pulled my shirt over my head. If I was to be mated by this bulky mobian-like being, than I prefered to do it with the comfortable absence of clothes.
"G-Gently." I stuttered as I felt something hard prodding against my lower lips. He was eager to dive right into the action and make me his, but he couldn't do that. Even through the daze in my mind that my heat created I still knew that we had to be careful if I didn't want to hurt myself.
So I reached down and grasped the tip of the stiff member between the beast's legs and guided it to my entrance. I tried my best to lube it up a little with my own juices, but there wasn't much I could do.
He didn't plan on letting me do much either. He quickly grew impatient and placed one hand on the leg that had been swung over his thigh, while the other one came to rest on my hip. He kept me steady as he positioned himself, I took the brief pause to prepare myself for what was to come, and thrusted inside.
I gasped when the tip made its way inside, stretching my opening and narrow inner walls wider than they had ever been. I couldn't exactly say that was a bad thing. Maybe the stretch would be able a big help in nine months.
It was surprising how much my mindset had suddenly flipped and how I accepted my fate so easily.
Whenever I had to do a mission during my heat, run-ins like this were something I always tried to avoid. But with strong beast like this one, especially after showing me how strong he was, it seemed like some old instinct woke up along with my heat.
That particular instinct told me to give in, told me to receive his potent semen and carry a child who would be just as as strong as his father.
That along with my heat, gave me no other option but to give in and let him have his way with me until he was finished.
I whined in pain when I felt him slowly push until his manhood was almost completely inside, a good few inches not being able to fit inside. He noticed it wasn't so goin to be so easy as my tight grip around him wasn't all that comfortable either, but he didn't want to stop. He wanted to take me and that was exactly what he was going to do.
"Easy... Easy." I whined as I felt him pull out slowly after a couple of moments until only the tip was inside, only to push the shaft back in on the same pace.
I was unable to relax as the thrusting didn't go as smoothly as I had hoped. But as my juices covered his shaft more and more, he began to slide in much easier. And as the pain numbed a little, I was able to relax, making it easier for both of us
My whines turned into pants before becoming soft moans as the numbing pain made way for pleasure. The grunts and groans leaving his vocals could only mean that he was enjoying himself too.
And as he pleasure within the two of us grew, the thrusting soon became more enthousiastic aswell. My body could only rock along as he started to thrusted faster. I tried my best to meet up with his thrusts, but he was too strong.
I reached for him as I wanted to pull him closer, but he just left me hanging, so I let my hand drop back down on the stone floor.
"Oh, what's happening?" I asked as my entrance seemed to stretch a little wider. The manhood inide me felt like it was swelling up a little and throbbing inside. I had felt someone's penis do that before when I had sex. It meant that they were close, right? That could only mean that I was soon going to receive his load inside. Maybe even for the first time of the night.
"Do it... Please do it." I pleaded with him inbetween moans. I wanted him to cum deeply inside me and fill my womb up. And I wanted him to do it now, when all of this pleasure had made put me on the edge of orgasming aswell.
It seemed like my wishes had been heard as the beast pushed his manhood as deeply as he could inside and released, sending me flying over the edge aswell. The overwhelming feeling of my orgasm was barely washing over me when it was multiplied tenfold when thick ropes of his potent cum were shot straight in my womb.
"Ah... Yes... Thank you..." I said, feeling grateful to receive the semen of such a strong creature inside. My body shivering and my inner walls tightening around the member to try and milk him until every last squirt was inside.
But as our bodies calmed down a little once every last drop was secure inside me, I felt him pull out gently, only to discover that he was still as hard as a rock.
I stared at the stiff manhood in shock, but I quickly snapped out of it. He wanted more of me just as much as I wanted more from him. I changed positions until I was on all four with my butt in the air and my head resting on my arms as I watched him from over my shoulder.
The bulky creature wasted no time in grasping my hips and pushing the tip of his hard manhood inside. The shaft was still wet from my juices and I was still stretched-out by his member. We didn't have such a difficult time getting started with our second time.
"Ah, yes!" I moaned loudly when the hard erection slid all the way inside. Those few inches couldn't fit in yet, but I knew that, if we were going to do it again soon, that they were going to fit some time tonight.
And I was right.
He wasn't going so easy on me this time. He almost instantly went right into the action, pulling out and pushing back in, time and time again. I tried to help him along, but literally all I could do was lie there and moan, pleading him to go faster and to never stop.
He kept on going and going, working both of us to a new orgasm until we both came again. My body tensing up and tightening as he forced another load to settle in my womb. If I were to try and pry myself free it wouldn't have worked. He had such a tight grip on my hips, he was not letting me go until everything to the last squirt had been unloaded into me. And that took quite while.
"Let's go again." I pleaded with him as I nuzzled my body up against his, trying to entice him, to convice him to take me for a third time.
Even after cumming big loads twice into my belly, he still had an erection standing stiff on his crotch. Although, it seemed like he needed a little bit of a push now, like he had suddenly grown uncertain about letting himself get carried away by my heat.
Those two loads weighed pretty heavy in my womb. My leg were pressed shut and I was trying my best to keep anything from spilling, even though that was incredibly difficult. There was just too much cum inside. A small bump had even risen on my lower belly.
"Come on, let's do it again." I tried to convince him, using one of my hands to stroke over his hard lenght.
He wasn't able to ignore me for much longer and pushed me down on my back. I complied, my heart beating furiously in my chest from excitement as I spread my legs for him. He wasted no time in taking my hips in a vice grip and, with one hard thrust, forced his manhood inside once more. I yelped as I was forced to take those last inches inside aswell, making our hips finally meet.

By the time he was finally done with me, it was already 3AM. In the end it didn't just stay with three times. We had done it in several different positions. Missionary, doggy-style, me riding him...
Now that I was lying here on my back with cum from the latest load pourig out of over-used opening and staining the temple ground I was lying one, I knew I was thoroughly bred now.
My womb was filled to the brim, my inner walls and entrance stretched and sore and my nether lips were red and swollen. He had tried cleaning me or attempted to ease me down there, but noises in the distance grabbed his attention and forced him to leave me here.
I knew I was going to be pregnant now. I was in the middle of my heat and the many times we had mated tonight ensured it. I was definitely going to be pushing his baby out in nine months time.
"I... I need to go home." I muttered to myself tiredly. I was exhausted and wanted nothing more than to go home now.

Five months later I found myself to be right.
I was sitting on the couch in Sonic's livingroom with a five month old pup growing inside. Although, my belly looked like it was six months along. The blame was to be found with the pup growing inside as it wasn't just one or two I was having, but a whole litter of five.
Some of Sonic's friends, Amy, Tails and Knuckles to be exact, were here aswell. Rouge was sitting on the couch next to me, seemingly a little worried as I tried to explain exactly why I let myself get led astray by my heat, without telling the details of course.
"I told you before! It was a huge, muscled, testosterone-filled beast with the strenght to back it up and I was in heat! How could I just let him go?" I stated as I explained it for the so maniest time.
Knuckles just sighed and shook his head, Tails didn't seem to know what to think, while Amy seemed to be a bit angry. Rouge was just sitting there, wondering if I knew just who it was I had let myself get mated by. The owner of this house, Sonic, was standing in the doorway, smirking in delight and enjoying the way I described the father of my children. I didn't pay all that much attention to him until his chuckling started to annoy me.
"Sonic, do you mind?" I asked.
"Guys, I really think it's time we tell him." Sonic said, instead of answering me.
It was Knuckles who decided to speak next.
"Shadow, you do know what happened to Sonic when Dark Gaia was around, right?" He asked.
Something happened to Sonic? He seemed just fine to me.
"Shadow, hun, somebody should've told you this sooner, but the Dark Gaia energy turned Sonic into, what he calls, a Werehog. The daddy of your babies is him, hun." Rouge continued for him.
I just stared at her like she had just grown a secon head, trying to wrap my mind around this news.
"So... Sonic is..... And I just let...." I could barely speak, I didn't know what to say. Fortunatly, they knew what I was trying to say and they all nodded to answer my questions.
"Sonic, you bastard! How dare you! Why didn't you tell me anything!" I yelled at the smirking hedgehog standing in the doorway.
To discover that he was turned out to be the father of my children was absolutely shocking to me. But now that I thought about it, I guess the two had some similarities that I should've noticed that night.
"Hey, sorry, I got a bit worried when you stopped fighting back after I made you collide with the ground so hard. By the time I knew you were okay, your heat had gotten to me. The sexy beast took over and I just couldn't control myself, you know!" Sonic defended himself as he approached me and let himself drop down on the couch, an arm wrapping around my shoulder.
"If you were just a mindless beast, I was just going to let it slide, but you're not. So don't think you're going to weasel your way out of taking care of them." I growled, crossing my arms in front of my chest in anger. I wasn't angry that it was Sonic who had gotten me pregnant. No, in fact, that was the best night I ever had. I was just angry that he didn't tell me anything.
"Don't worry, I'll be there, we can work something out!" He said, grinning reassuringly at me.
That was all I need to have my anger melt down. I sighed in content and let my arms rest on my belly instead, enjoying the strong movement inside and wondering what more surprises the future might bring us.