I watched in pure heat as his knot came sliding out of his sheath. The hand that I was using to stroke him reached out and cupped that massive ball of flesh and rubbed it hard. Charlie howled loudly and shoved another two inches of cock into my mouth. I felt his cock swell up and then I was being drowned in dog cum. I was in shock at how much there was of it.

I had once entertained the foolish idea that I wanted to be a veterinarian when I grew up so when I was in my early teens, I read pretty much everything I could about animals and how their bodies worked. I knew that dogs actually produce very small amounts of cum each time they orgasm. This is why they have the knots. The knot locks them together with the bitch so that they can keep pumping cum into her for a very long time. Charlie was filling my mouth with more cum than I usually shoot when I jack off and it tasted incredible. I took every drop and kept trying to suck more out of him until he finally pulled away from me and stepped back several feet. He was still rock hard, but seemed to be satisfied for the moment.

Meanwhile, Bear finally get tired of licking out my intestines and pulled his tongue out. The break in the mind numbing pleasure I was feeling kind of helped clear my head. I realized just how fucked up what was happening was. I licked my lips and tasted dog cum on them. Part of me wanted to throw up at the taste, but a part of me didn't care. I decided that the best thing for me to do was to get the hell out of there and figure out what had happened later. I didn't trust my balance enough to get up the way I was so I rolled over onto my hands and knees to make it easier to get up. Big mistake on my part, after all they don't call it the "Doggy style" position for nothing.

The second I was kneeling Bear leaped forward and tackled me. He wrapped his fore paws around my waist and jammed his rear paws between my legs to keep me from getting up. I started cursing at him in Spanish, Arabic and even some Chinese that I had picked up from an old girl friend, but then he jammed his cock head into my asshole and the cursing stopped.

Man, if his tongue had felt incredible, the feeling of his cock head sliding into my ass was heavenly. I could feel his cock spilling his juices into my ass and also some sort of weird wetness coming up my ass to meet his cock. It felt kind of like when you have the runs and everything comes out, but much nicer. I could feel every single inch of his cock as it slid into me and I wanted more. I kind of waggled my hips like I had seen female dogs do to encourage him.

It worked better than I could have imagined. Bear barked loudly and shoved his hips forward hard! Before I could even blink, he had jammed all seven inches of his meat into my asshole and I could feel his knot knocking at my back door. I was panting just as loudly as he was and my cock felt like it was going to explode again.

I could feel something really incredible inside of me and wondered if I was feeling what a woman felt when she was about to cum. Just when I was thinking that it couldn't get any better, I felt Bear's cock twist inside of my ass. It was like my ass muscles suddenly grabbed his shaft and moved it. I felt his cock tip slide up and any kind of thoughts I had were wiped away. Suddenly, I was nothing more than a bitch that needed breeding.

Bear seemed to agree with me because he started yelping and pushing harder and hard into me. I felt his knot press against my sphincter and then shove it open hard. It should have hurt because the damned thing was as big as my fist, but all I felt was pleasure and satisfaction. He kept pumping harder and harder, driving the knot deeper as his cock slid further into me. This had to go on for an hour before he stopped shoving and locked his legs.

I felt something thick and slick being pumped into me and that sent me off on the first orgasm that I have ever had without someone touching my cock. I shook like I was having a malaria attack and came all over the floor. I must have cum for a good three minutes, even though my balls were drained in ten seconds.

I don't know how long it took for Bear to finish and shrink down enough to slip out of me. He got down from my back and walked over to stand beside me. I swear that he was smiling at me as I crouched there on the floor panting. I was just about to try to get up again when Bear looked over my shoulders and barked loudly. I wasn't sure what was going on until I felt Elvis jump up on my back.

I was too weak to even try to resist as he jammed his cock inside of me. I saw Charlie sitting off to one side with his own massive erection and remembered how I used to watch as the neighborhood dogs would take turns with a bitch in heat for hours and hours. I looked over and saw that Bear's cock was already getting hard again and realized that was what was happening here. As my mind gave out to the powerful fucking, I prayed to God that it would last forever.

Chapter Seven: Escape Overture ------------------------------

Okay back to me for the moment. When I finally came too after the three way with Barry and Paul, I felt like I had slept for hours. My watch told me that I had only been asleep for about an hour or so, but I felt completely rested and reenergized. I was still horny as hell, but decided that this seemed to be the natural state for whatever was happening to us.

Once again I was struck by the severe lack of embarrassment or regret for what I had done. I had cheated on the woman who would bear my child and practically raped Paul. I should have been feeling at least a little shame or regret, but I wasn't. Part of it was the strange new hormones coursing through our bodies, but I sensed that something fundamental was changing in our very mindset.

I had no idea where this journey was taking us, but it was definitely changing us even though I was not sure if it was for the better. I disengaged myself from my two lovers and smiled at the way Paul was still clutching Barry's cock possessively. They hardly even stirred as I got dressed again and left the room, closing the door again behind me.

I started back to April's room to see how she was doing and to check on Angela, but stopped when I realized that the door to the room where Langdon had been locked up was standing wide open and there was no sign of Vargas. After knocking on April's door and telling her to keep the door shut and locked just in case Langdon was still dangerous, I set out to find Vargas. This wasn't easy because the base was pretty large and currently only held seven people. Since two were asleep in the shower room and two were hiding in April's room, I didn't have a lot of help in my search. (For the record, there are two other members of the research team, but they left with the Professor for some leave in McMurdo so the place was pretty deserted.)

After searching all of the residential dome and the dome where we kept the lab equipment for both teams, I checked the storage dome. To say I was surprised to find Vargas on the floor of the dome naked would be an understatement. To say I was shocked to find him being screwed up the ass by a dog the size of my motorcycle back home would be the understatement of the millennia. From the way two other dogs were lying around asleep with contented looks on their fuzzy faces, I judged that all of this had been going on for a while.

I was just about to try and pull him off of Vargas when it hit me. The musk was overpowering here, much more powerful than it had been with any of the other situations. It was like all of the O2 molecules in the air had been replaced by the musk, but somehow you could still breathe. My hard-on, which had never really gone down, sprang back to full erection and then some.

When I approached the dog and Vargas, the mutt looked up at me and whined, but I just glared at him. I was already unzipping my pants when he kind of dipped his head down and dropped his tail below his legs. He backed off of Vargas and climbed down. His cock made a loud popping noise as it slid out and more cum than I had ever imagined started oozing out of Vargas' asshole. These dogs had been obviously fucking him for a while and from the look on his face, he had loved it the entire time.

Almost without thinking, I dropped down to my knees behind Vargas and grabbed onto his ass. Had I been thinking clearly, I would have been shocked and even grossed out by what had happened and what I was about to do. But with my mind fogged by the massive amount of musk in the air, I just shoved myself balls deep inside of his slimy ass and started fucking. Vargas could obviously tell that I wasn't one of his canine lovers because he seemed to come to his senses. He straightened up and glanced behind at me. I could see the questions in his eyes, but I didn't care. I slid my cock out about half way and then shoved it back in again. This made him close his eyes and groan.

God, he felt good. His ass was white hot and slicker than oil. I could feel the dog cum oozing around my shaft as I slid in and out. Vargas was panting so hard that I was afraid that he was going to hyperventilate and I wasn't much better off. My balls were slapping his ass cheeks and I could feel his ass muscles gripping and guiding my cock as it went. I was only a little surprised when I felt them grip me tightly and shove my cock head upwards. Just like with Paul, I slid into a place that shouldn't exist and just like with Paul, it felt like pure heaven.

My cock almost seemed to lengthen so it slid even deeper. When this happened, I truly lost it. I started pounding into Vargas as hard as I could, making him moan louder and louder. As I screwed him, I happened to look over at the dogs and was amazed at what I saw. The smallest of the animals was crouched down on the floor and the biggest of the brutes had mounted him. I was shocked to see that the bigger one was shoving one of the biggest cocks I had ever seen into the other dog's ass.

Now I know that certain animals do practice what we would consider homosexual relations mainly because most male animals are always ready for sex and females are only ready during heat. Dogs, gorillas, chimps and many others hump each other and anything else they can get their paws on, but I had never seen two male animals actually screwing, but the biggest one was definitely sliding his cock in and out of the other dog's ass.

Even more amazing was the fact that the other dog loved it. This made me even hotter and I could feel the cum boiling in my balls. I wanted Vargas to cum with me so I did something that his doggy lovers couldn't do. I reached around and started pumping his cock with my hand while I screwed him as hard as I could. This made him buck and moan.

He started fucking back against me harder and harder. He started whining almost like the dogs over beside us as I started filling him with even more cum. He started spewing all over my hand and the floor. I could feel it, as my cock head seemed to expand and plug the entrance to the new place.

When I recovered from my orgasm, I pulled very gently out of Vargas and sat down hard on the floor. Vargas slumped forward and slowly rolled over onto his back. I could tell that his pleasure drunk mind was starting to fade because he actually looked aware of his surroundings again. I glanced over at the dogs and saw that they had finished too. The two smaller ones were lying on their sides with cum leaking out of them. The bigger one was sitting to one side watching us with what seemed to be a highly intelligent expression on his fuzzy face.

Once our orgasms had faded both Vargas and I seem to come to our senses. The musk was still in the air, but it didn't seem to have a great a hold on us as it had before. Vargas rolled over onto his side and stared at me intently like he was trying to figure out what had happened. I was watching his eyes looking for any signs of anger or aggression for what we had done, but there was nothing there but curiosity. "So, Amigo. Do you want tell me what the fuck is going on here?"

I took a chance and gave him the Reader's Digest version of what I knew and what I thought was happening. It actually felt good to finally tell someone what was going on. He listened to everything without saying a word, and then shrugged. "My parents would make some smart ass comment about water and bridges. You didn't know what was going on until it was probably too late to do anything about it so no fault on you. We have got something more important to worry about. If Langdon is lose, no telling what sort of trouble he might cause."

I agreed and gave silent thanks to God that Vargas had a good head on his shoulders. We did a complete search of the base, but found no sign of him. We were at a loss until we decided to check and see if he was hiding in the Snow Cat. When we opened the door that led to it, we were blasted with ice-cold winds. The temporary tunnel between the building and the cat was torn to shreds and the massive snow vehicle was gone. We now knew how he had gotten away from the base.

"Dios! Now I wish we hadn't kept that damned thing idling all this time. The engine would have frozen up and there would have been no way he could have cranked it without days of thawing."

For those who don't know and as I found out, diesel engines are very vulnerable to freezing temperatures. To keep them from freezing up completely, they have to be kept at a low idle so that the heat of the engine can keep the fuel from freezing. I had known that the engine on the cat was still going, but hadn't realized why until Vargas explained it to me. "He must be headed for McMurdo, but why?" I remembered what I had found and snapped my fingers. "His wife is supposed to be there. They were going to get together during his leave. He must be trying to get to her."

"How bad will it be if he gets around other people?"

"Worse case scenario is that we could be looking at a world wide Pandemic. It takes a while for the symptoms to manifest themselves and even longer for any physiological changes to occur. If we don't find some way to stop him and at least isolate him, then people could become infected, leave McMurdo and spread the changes to the entire world."

"Okay, that definitely counts as bad," Vargas said. He pondered for a second, and then motioned for me to follow him back to the dog's dome. He approached several objects covered with heavy tarps and pulled the tarp off. Underneath were four very large snowmobiles, complete with helmets. "You are insane. It is below zero outside and the visibility is next to nothing. There is no way in hell we can make it through all of that to McMurdo."

"Hey Amigo, if we want to stop Langdon from turning into the next Typhoid Mary, then we have to do something." Vargas shrugged. "Hey, they are gasoline powered, can go over 80 miles an hour and they have enough range to get us there at least with a little luck. Our only other option is to hope that Langdon doesn't make it to the town."

I nodded and we split up to get the gear we would need. Vargas had a spare suit that he said he would loan me that had heating elements that could be plugged into the mobile's electrical system so I went back to my lab to pick up my palm top that also had a satellite GPS built into it. It should allow us to plot a relatively straight course to McMurdo, if we didn't fall into a ravine or get blown away by high winds. Then I stopped by April's room to check on her and Angela.

When I knocked on the door, April stepped out clad only in a smile and sandals. I had seen the look on her face enough times to know what she had been doing. The words "freshly fucked" came to mind. I ached to ask her what was going on, but realized that I didn't have the time. I quickly informed her of what Vargas and I planned to do. I didn't want to worry her so I just told her that Langdon had flipped out and stolen the cat. She seemed to buy the story that Vargas and I were simply going out to try and rescue him. She also seemed to want to tell me something, but couldn't seem to find the words. I gave her a passionate kiss and told her that we would be back as soon as we could.

I got into the suit that Vargas gave me, feeling like a small child wearing their parent's clothes. Vargas and I were close to the same size, but he was much more buff than me so the damned thing fit very loosely. After that, it took us nearly an hour to fuel up the mobiles and drag them outside. As Vargas gave me a quick course in driving the things, I did notice that the storm seemed to be lessening. The winds were much calmer than they had been just an hour ago and I imagined that it also seemed a little warmer. This gave me some hope that we were going to make it to our destination alive, but it also worried me because Langdon would have a much easier time too.