Charlene's Surprise NOTE: This story is a follow-up to "Breeding Season" Charlene and I were still in our non-anthro forms after mating once already today as I had filled her fertile womb with a strong dose of my sperm. Both of us felt very happy after mating and we remained close to each other for quite a while. Though at the time my sex drive had been satisfied, I knew that Charlene's vulva was still swollen and still in need of more of my seed. But for now, all I wanted to do is rest and recover my strength so I could mount her again when I was ready. While I relaxed, Charlene and I curled up together in the corner, with me on top of her as I closed my eyes and took a little nap. As I was drifting off to sleep, I kept feeling my twin sister licking me with her warm tongue across my nuzzle, moving it slowly across my facial fur. She was telling me that she loved me and as I rested I placed one of my front legs over her and started to think about my sister. Not long afterwards, I had a dream about Charlene and I in our non-anthro forms, living like non-anthro foxes. In my dream it was also mating season and I watched as my sister behaved in a playful manner towards me, circling around my dream self, flagging her tails to me and showing off that swollen vulva of hers. The dream felt so realistic that it began to arouse my foxhood again as I murred in my sleep and tightened my grip around Charlene while doing so. Soon, the dream became more sexual nature as my dream non-anthro self climbed onto dream Charlene's back and started to mate with her just like we had done in real-life a little bit ago. This made my real-life foxhood grow stronger and begin to push up against Charlene's lower back. Then, I unknowingly started to hump her with it a bit, dripping precum onto her lower body just above her two tails as I was dreaming about having it back inside her hot and tight vixen vulva. Then, all of a sudden, I felt something hot and wet touch my face, which snapped me out of my dream. At first I was upset, I was having a good time thinking about my sister and something came along to ruin it. "Hey, what gives? I was having a great dream!", I responded in feral fox language as my sister was looking at me with her blue eyes, murring softly. "Mmm...I know...I can feel it", she answered in feral fox language in a playful tone as I noticed that I was fully unsheathed again and the tip of my maleness was poking lightly against her lower back. My ears lowered a bit and I let out a whimper, thinking I may have embarrassed myself. "Sorry sis...I couldn't help it...after all it is our mating season", I answered sheepishly. However, she murred quite loudly in response before getting out from underneath me and turning to face me, licking my nose lightly. "Why are you dreaming about mating with me when we could be doing it for real?", she responded back to me after I felt her lick my nose as she turned around to show off her vulva. "I'm still in heat you know, and I could use as much of your sperm as possible to add to our family", she added, brushing both of her tails lightly against my nose. The sight of her twitching vulva, a small amount of the semen I put inside her earlier, and the scent that came from her two tails were plenty to make my foxhood strong and excited for her. In addition, my balls felt reloaded, heavy with another fresh batch of seed to deliver to my fertile sister. "Well, why didn't you say so?", I answered eagerly as I attempted to mount Charlene a second time and bring my horny foxhood towards her receptive vulva. However, before I could get a grip on her hips, she moved forward a little, preventing me from getting on top of her. "Hold on there, you're not putting it inside me yet. I have something else planned for us before I let you mount me again", Charlene responded as I tilted my head to the side and felt a bit confused. "Like what?", I asked curiously, feeling my maleness throbbing for my sister's vulva while dripping fresh precum onto the floor. She looked back to me and murred, brushing her tails against my nose again. "Mmm...let's do it outside...the way our fellow four-legged foxes do it", she suggested as I whimpered a bit and covered my erection with one of my tails. "But Charlene, it's below zero outside, I don't want to go out there!", I mentioned to my sister as she presented her attractive rump to me again and made her vulva twitch. "I know it's cold outside, but I'm nice and hot on the inside. We can keep each other warm while we're out there, if you know what I mean", Charlene mentioned to me eagerly. "Now c'mon...I'm not going to stay like this forever. I need you to give me a litter of cute four-legged fox pups and I don't want to stop until I'm sure the deed is done!", she added eagerly as my sex drive couldn't resist the lure of her swollen vulva. As Charlene led the way towards the back door of the house, I followed her, still staring at her vulva as she purposely left her tails off to one side of her body. I continued to see it pulse for me, growing even darker in color as we both walked through the pet door that I had originally put in for Hope. A few seconds later, we were both outside as that chilly North wind hit the side of my body, making me feel cold and tingly on contact. Even though I had a thick fur coat, it was still cold and I didn't want to be outside right now without clothes on. However, Charlene's vulva kept calling out to me, keeping my shaft hard and excited for her as I followed my mate into the snow-covered yard. Then, after a few seconds, she stopped and got into position directly in front of me. "OK, now you can mount me", Charlene commented playfully, making her vulva twitch again as a little bit more of my leftovers bubbled out of the opening. "Come on now, don't waste time. It's far too cold for those kind of games before sex", she added as it appeared she didn't want to be outside any more than I wanted to be under normal circumstances. Naturally, I was quick to give in to my sexual urges, mounting Charlene in a heartbeat and clamping tightly around her lower body to make sure I'd stay on her this time. Once I was certain she was letting me mount her, I brought my happy fox cock towards her eager vulva, placing the tip against it for a second before pushing it back in, letting out an excited yip when I penetrated her. I felt my sister lean back towards me a bit as I pushed inside her, letting my foxhood reach deep into her tract until all but the knot was inside. The inside of her vagina felt as good as it always did to me, making me forget about the arctic air around us as I felt her heat radiate through my eager fox cock. Her insides were also wet and sticky, still coated with some of the cum I shot into her the first time we had sex today. This made it easy for me to move inside her as I quickly began to hump my sister from behind, feeling my shaft rubbing against her tightening walls. Precum was starting to spurt inside her again, mixing with her juices and my earlier load as I heard Charlene begin to pant and lean back against me even more. Her vaginal walls happily spasmed around me, grabbing and tugging on my maleness while I moved inside her. It was clear to me that she didn't want to stop mating with me until she was sure that her eggs were fertilized, which didn't bother me a whole lot since I was happy to give Charlene as much sperm as she wanted, breeding with her just like I would with any feral vixen who would present their vulva to me like Charlene did. Since I had already been stimulated by her once today, my shaft felt more sensitive than normal as it moved rapidly through her canal, growing thicker with each passing moment while my knot kept hitting against her swollen vulva. I started to move from side-to-side while I was thrusting, feeling the desire to cum inside Charlene again growing as my balls churned with large amounts of cum. My front legs held her hips tightly, making sure to keep us close together for when the knot slipped inside as I panted happily and let my feelings for my twin sister naturally take over. Charlene kept pushing back against my knot, trying to get it back inside her as I felt her vulva pulling on my length. She panted along with me as we were mating, enjoying the hot feeling of our bodies united in sibling sex as much as I was and feeling the desire to give her batch of eggs another one of my sperm baths. I continued to hump her rapidly, feeling my knot hitting against her hot outer lips several more times before it finally passed through them, beginning to grow larger the instant it sensed Charlene's heat and wetness. Like she always did, I felt Charlene clamp down on my growing bulb, gradually closing in tighter around it as we both panted excitedly. I kept moving from side-to-side, making sure it would go as deep as possible before it was full-grown as well as to give my balls the final stimulation it needed to start releasing more cum into Charlene. Then, after a handful of seconds, I let out a high-pitched bark while feeling my tailhole tremble a bit and my seed rushing through my foxhood. It raced towards the tip of my shaft as it was just inside Charlene's cervix before exploding inside her a second time, giving her womb another dose of my hot and creamy seed. Charlene let out a high-pitched yip of her own, clamping very hard on my entire length as I came as her juices poured over it, leaving my length feel hot and wet all over. Then, once the initial feeling of our climaxes eased, I saw Charlene look towards me, reaching her tongue out happily as I did the same for my sister, allowing our tongues to touch during the moment we were becoming stuck together again. I came hard into Charlene, determined to let my sperm fertilize her eggs and create her litter of non-anthro pups. I could imagine what it would be like when they were born in the Spring, seeing mutliple little four-legged two-tailed fox pups, some of them with pink noses like their mother nursing from Charlene in her non-anthro form from her milk-filled and swollen teats. The thought of becoming a father with my sister spurred my desire on further as my seed freely shot out of my tip, delivering much of it directly to Charlene's uterus as it was now becoming a bit bloated from receiving two rounds of seed from me. The initial burst of my seed lasted a good half-minute, delivering the most potent cream into Charlene before it started to settle down and concentrate more on energizing my tadpoles, making sure that they'd have the energy to reach the eggs within Charlene's fallopian tubes. However, things were far from over for us. Now that we had calmed down a bit, I dismounted my sister and turned the tie with her, feeling her vulva hold and tug on my length while I leisurely added more of my cream to her womb. We panted happily together, touching tails while our genitals were united, stuck together like any other feral fox pair. We stayed in our spot, not moving an inch as I was able to ignore the feeling of the cold wind and my paws in the snow thanks to the intense heat of my sister's vagina hugging my shaft tightly. I knew that she was feeling warm on the inside as well, thanks to my throbbing shaft and the massive load of sperm that was swimming around throughout her reproductive tract. Billions of my tadpoles were likely inside her, swimming around eagerly as they impregnated her, fertilizing one egg after another until all of our non-anthro pups had been conceived. Our union lasted about a half-hour as I slowly filled Charlene, making sure she was good and pregnant while being assisted by the gentle pulling of her vaginal walls around my foxhood. However, as time wore on, I began to feel tired as my sex drive calmed down and the load inside my balls had drained. My knot started to shrink and I could feel my length beginning to come loose from Charlene's grip. I didn't want my tie to end with my sister yet, but I also knew that there wasn't much I could do to make it last. I had already mated with her twice and it was unlikely that I'd be able to mount her again without giving my body a more meaningful break. Slowly, I felt my shaft coming back out of Charlene, starting with the knot and followed soon after by the rest of my length. The hot feeling I felt around it quickly faded away and I started to feel cold once more as a fresh breeze blew against my body. After pulling out of Charlene for the second time, she immediately turned towards me, coming alongside my body and licking the side of my cheek. Her kiss felt good to me, but the cold wind took some of that feeling away. I knew I had to get back inside to warm up, it was too cold for me to stay outside like this for too much longer. So, I began to walk back towards the pet door with Charlene following me. Apparently, she didn't want to have anything to do with the cold either now that we weren't mating together. When I got back inside, I finally changed back into my normal form, standing up on my two legs as I went over to the fireplace to get it started up. If I wanted to, I could change into a ninetales and start the fire the easy way, but I was too tired to change forms a second time, so I had to light it the old-fashioned way, getting it going within a few minutes. Meanwhile, Charlene walked into the room, curiously still in her non-anthro form as I looked at her with both of her tails raised. "Perhaps she wants me to mate with her again later on", I thought to myself while looking at her, thinking that this might be the reason why she was still in her non-anthro form. "Well, we'll see how I feel in a little bit. I'm sure she's probably been impregnated by now, but if she's still in the mood later on I might mount her again anyway", I figured as the fire in the fireplace began to warm the room, making me forget about the chill that was outside. I went over to the couch and sat down after getting the fire going, staying completely naked as I felt Charlene climb onto the couch and then on top of me. She placed her front paws on my chest and started to lick my face with that warm tongue of hers, keeping her tails hoisted high as a little bit of my leftover cream bubbled out of her swollen vulva. I placed my hands on my sister's cheeks and kissed her deeply, feeling her tongue enter my mouth while mine entered hers. The kiss lasted a few seconds before I pulled out and looked into her pretty blue eyes. "I love you, sis", I told her sweetly, rubbing my nose against her cute pink nose. She happily yipped back to me, telling me that she loved me in feral fox language before I felt her lay down on my lap, yawn, and fall asleep right on top of where my sheath was. I couldn't blame her for wanting to rest there, after all we had just mated twice and she seemed to still be in heat. I allowed her to stay on my lap, softly caressing her back as she started to sleep while I decided to take a nap of my own while sitting over by the fireplace. A few hours later... When I woke up after my nap with Charlene, I looked down at my lap and noticed that she was still in her non-anthro form as she was cuddled up next to me. I found it a little odd that she'd still be in non-anthro form after her nap unless she was still in a breeding mood. However, when I took a peek down at her vulva, I noticed that it had returned to its normal size and color. This meant that by now my sperm had fertilized her eggs and her body was no longer in the mood to accept any more of my seed...at least as a non-anthro vixen. As I was looking at her vulva, she looked back towards me curiously. "I think that we've made our litter", Charlene commented to me in feral fox language as I placed a hand on her cheek and caressed it softly. "I think so too", I answered back before leaning down to kiss Charlene on her nose. "Anyway, we've had our fun, but I think it's time for you to change back to normal now. I want to have my sister to be my size again", I added softly, thinking it was about time Charlene changed back to her normal self. Normally, our transformations were rather simple. All we would have to do is think about a specific form and our bodies would change to take that form within a matter of seconds. However, I saw Charlene have her eyes closed while growling a little, seeming to struggle with the transformation process as she remained a non-anthro vixen. She kept trying several more times, but I didn't see any change at all in Charlene's appearance. "I...don't know what's wrong with me...I'm trying to change back, but I can't seem to do it!", she responded with a whimper as I picked her up and looked at her a little closer. "That is very odd, neither of us have had trouble with our transformations before", I thought to myself briefly before I kissed my sister on her nose, thinking of an idea. "Why don't you try thinking about me and what we'd like to do together once you do turn back to normal", I suggested to Charlene as she closed her eyes and tried again. As she tried to transform, I noticed that her vixen vulva became puffy again, entering the form of psuedoheat that she went into whenever she was a non-anthro fox and was in a playful mood for me. However, this was the only physical change I noticed with Charlene as she stayed a non-anthro vixen. When she opened her eyes and saw she was still in my arms as a non-anthro fox, she whimpered again and curled one of her tails over her swollen vulva. "I don't know what else to say, sis. This hasn't happened to either of us before", I commented to her before kissing her on the nose again. "However, I will try to find out and I'll do what I can to get you back to normal", I mentioned to my sister, trying to be helpful to her as I figured the only real way I could help her was to make a trip to Rapoville. After getting dressed, I picked up Charlene and carried her with me through the Rapoville gate in our basement, arriving in the village a few moments later as I made my way directly towards Dr. Cure's clinic. Since it was the middle of the day in the village, most of the villagers were busy going about their normal lives and I didn't get stopped by anyone along my way. Right now, my main concern was Charlene and I didn't want anything else to get in the way of helping her. It took me a couple of minutes to walk towards the clinic, carrying Charlene with me in my arms as she stayed a non-anthro vixen. When I finally got there, the clinic seemed to be pretty quiet at the moment with no patients waiting in the waiting room for Dr. Cure. In fact, there was no one visible in the clinic at all. "Hello...is anyone in here?", I called out curiously as I heard a stumbling noise coming from the exam room. "What the hell is going on in there?", I thought to myself while keeping Charlene in my arms as she tilted her head to one side, obviously thinking the same thing I was. A few seconds later, I saw the familiar face of Mari's aunt appear from just outside the exam room door. "Sorry...I'll be right with you", she called out to us before the door closed again and I heard muffled talking coming from inside the room. "What is she doing in there?!!", I thought to myself even more curiously as the noises continued for several more minutes before finally coming to a stop. Then, a couple minutes later, the exam room door opened up and she reappeared in her typical medical outfit. "Sorry about the wait, it's just been so quiet today that I decided to have a little bit of time with my husband while waiting for someone to show up", she commented to me as I walked into the exam room with Charlene in my arms as I was still curious about what she was doing in there. "Really...and what were the two of you doing in there, huh?", I asked in a playful manner, making the doctor both giggle and blush. "Nothing that you and I haven't already done!", she commented in an equally playful manner. We had gotten together sexually ourselves before once when she had a craving to add to her family. Dr. Cure's husband was sterile, which meant she had to breed with other males in order for her to have a family. She had done it with Jowee once before (with Mari's approval) and I had provided Dr. Cure with a second set of twins a year after Jowee made her a first-time mother. "Anyway, enough about that...what brings you here?", she asked curiously after a moment as I brought Charlene to the exam table and set her down. "It's my sister...she decided she wanted me to give her non-anthro pups and now she's stuck as a non-anthro vixen and neither of us know why", I explained to Dr. Cure as I knew she was aware of the relationship Charlene and I had while she was looking at my sister. "Well, your sister looks to be healthy from the outside...but maybe there's something that we're missing", Dr. Cure explained as she looked over Charlene once and then turned to me. "How are you two able to change your forms anyway?", she asked me curiously, not understanding how our transformations work. "Actually, it's a genetic trait of ours. It's on the same chromosome that allows Charlene and I to breed together safely despite the fact that we're full-blood siblings", I explained to Dr. Cure. She continued to look over Charlene a little more and seemed to get an idea in her mind. "Hmm, maybe we should do a genetic test on the both of you to see what you mean", Dr. Cure suggested as I promptly presented her with a piece of paper showing both of our genetic profiles. "There's no need to poke us with any needle, Donna...I have our papers right here", I mentioned to the doctor as she looked at them and studied the coding of the DNA strands. "Hmm, you two definitely have interesting genetic profiles...I'm familiar with fox genetic profiles and raposa ones, but none look like yours", she mentioned as I wondered what she meant by that. "I think I'll need some time to look over these and some of my books before I have an answer for you. In the meantime, why don't you just bring your sister back home and I'll come find you when I know more", she added. I wasn't sure how long it would take for her to go over the information I provided, so I decided to take her word for it and bring Charlene home. In the meantime, we'd just have to go about our lives as normally as possible until we had more information. When we arrived back home, I carried Charlene in my arms to the kitchen before setting her down on the floor near the fridge. Since it would appear that she was pregnant, she probably would need something to eat to give our pups a good start. I cooked some fresh bacon for Charlene and gave her a bit of milk, watching her eat the bacon as I gave it to her one strip at a time and seeing her lap up the cool milk with her tongue. Once I had a chance to go out and do a little bit of shopping, I also planned on getting some pre-natal vitamins for my sister, figuring that they would still work in her non-anthro form as they would in her normal form. Then, after Charlene was finished eating, I picked her up again and brought her to the living room, sitting on the couch as I caressed her soft back fur while thinking about what I was going to do to help her change back. As I sat there thinking about it, my ears perked up when I heard the sound of a door opening, figuring it was coming from the front door. I looked back towards the front door and saw no one there and felt a bit puzzled until I heard a familiar female voice. "Hey, I'm over here", Dr. Cure called to me as I looked back and saw the raposa doctor with the information I had given her. "Sorry, I didn't mean to sneak up on you like that. However, I think I've figured out why your sister is stuck in this form", she added as I gave Dr. Cure my full attention while keeping Charlene in my lap. "It didn't take me as long as I figured to discover this, I guess I had more free time on my hands today than I thought", she continued as we kept looking at her, waiting to hear what she had to say. "Anyway, you told me that your ability to transform was caused by genetics and that you normally have control over when you want to change. Well, I discovered a little something about Charlene that keeps her from changing forms", Dr. Cure explained as I listened to her. "What are you talking about, she has the same ability to transform as I do and much of our genetic profiles are similar, how can she have something that keeps her from changing forms that I don't have?", I asked curiously. "Because you're a male fox and the gene I'm referring to is gender-specific", Dr. Cure added. "You and Charlene both have the same gene that allows you two to transform into other forms you've come into close contact with or acquired by other means. However, Charlene also has another gene on her second "X" chromosome that kicks in whenever she's been impregnated. If she becomes pregnant outside of her normal fox form, she will remain stuck in whatever form she's currently in until after she gives birth. Once she delivers her litter, the gene will go dormant again and she should be able to change back to normal", she continued as I saw Charlene's mouth hang open. "YOU MEAN I'M STUCK LIKE THIS FOR THE NEXT TWO MONTHS?!!", Charlene exclaimed in fox language as I held her in my arms and watched as Dr. Cure scratched her head. "I'm sorry, I couldn't understand what she was saying", Dr. Cure responded in a calm tone before Charlene whimpered and hid her face with her tails. "Please forgive my sister, Donna. She's under a lot of stress right now, this hasn't happened to her before", I explained to Dr. Cure softly. "Anyway, you're telling me that she'll remain a non-anthro fox for about the next two months and then be able to change back to her normal self once she delivers the pups?", I asked to make sure I understood what Dr. Cure told me as she nodded. "Is there anything you could do for my sister to help her change back before then, I'm not sure she wants to be stuck as a non-anthro fox for that long", I added. Dr. Cure shook her head and placed a hand on mine. "The only way I'd be able to do anything about it is to give Charlene chromosome-altering drugs used on cancer patients. There is no way I could justify doing that since it could cause very serious side-effects to Charlene. You two could lose the ability to safely breed together or even worse", Dr. Cure added as Charlene's ears perked up as I heard her response to that. "There is no way I'm agreeing to that. As much of a pain it is to be stuck like this, I don't want to lose my ability to have my brother's pups!", Charlene exclaimed in feral fox language as I basically translated it for Dr. Cure. "Well then, I guess you're just going to have to get used to it for the next two months, sis", I explained to Charlene. "But don't worry, I'll take good care of you, make sure you're well fed and do my best to provide for the pups in your womb until you can change back to your normal self", I assured my sister before nuzzling her softly. "Anyway, I think you two have some work to do together, so I'll just show my way out. If you need my help again, you know where you can find me", Dr. Cure answered in a sweet tone before leaving as I was busy tending to Charlene. However, as I was nuzzling my sister, another thought entered my head. "Wait a minute, if you're going to be having non-anthro fox pups don't you think it would be best if we raised them like non-anthro pups?", I asked my sister curiously as she thought about it for a second. "Wouldn't that mean we'd have to do things like teach them how to hunt for their own food, which is something that neither of us has ever done. Not to mention the fact that one of your wives is a mouse?", Charlene commented to me, bringing up a good point. I knew deep down that the non-anthro members of our species hunted rabbits, mice, and other small mammals for food. "That's a good point there...but as much as we may not like to do it, we'll have to try for the sake of our pups. They'll need to learn how to do this for when they go out on their own later this year", I mentioned to my sister before rolling her over onto her back and placing a hand on her belly. "Besides, you want to be sure that your sons and daughters grow up to be healthy and successful, don't you", I added, tickling my sister a little bit as she swished her two tails a bit. "Of course I do...but, I'm worried about what might happen if we do. I don't want to develop a taste for mouse flesh and end up doing something to Melissa", she told me nervously as I kept caressing her belly while bending down to touch my nose against hers. "Charlene, you know that we've been bred out of that trait for thousands of years, right? I've accidentally bitten into Melissa a couple of times hard enough to draw blood and you don't see me going around making a meal out of her. Besides, there's only one part of her anatomy that tastes good to me, and I think you know what part I'm talking about here", I mentioned to Charlene as I heard her murr and lick her chops a little. "Yes...I certainly do. I can almost taste her sweet and tangy juices in my mouth right now", Charlene mentioned in a playful tone before turning towards me. "Alright, I believe you...we'll raise our pups the same way our feral 'cousins' would", Charlene mentioned before I kissed her on the mouth, murring into hers. To be concluded...