She hopped up onto my lounge chair and came to stand between my legs. She pawed at my bikini bottom, indicating she wanted me to remove it. I hesitated, but the thought of being able to shift convinced me to overcome my shyness.
I stood up and slowly slipped out of my final piece of clothing. Candi started purring loudly. It was probably her way of saying I looked hot. Either that or she was looking forward to tasting me.
“Fuck!” I yelled as my sister’s small, spike-covered tongue slid across my labia. I was back on the lounge chair, legs spread wide and chest rising and falling to the rhythm of my rapid breaths. I had never been this scared. Yet as the same time I was incredibly excited. And not just because of the shapeshifting. This was my first lesbian experience. It was also my first bestial experience. And my first incestuous experience. But above all else, it was my first sexual experience as an adult. I guess Candi had been right when she claimed my life would be different now that I was an adult.
My sister’s barb-covered tongue raked at my labia, causing pain to erupt across it. I probably should have been worried, but I didn’t care. I would have endured far worse in the name of unlocking my shapeshifting gene. I didn’t even cry out when the spiked tongue slithered across my clit. Pain shot through me, but also arousal. As impossible as it seemed, I enjoyed the feel of my sister’s tongue on my clit. In fact I enjoyed it so much that I began moaning softly. Moments later Candi started purring. She increased the intensity of her tongue strokes. Within seconds it was darting back and forth across my clit. The pain was still there, but it had mixed with the arousal that now filled me, creating an oddly pleasurable pain-pleasure cocktail. Actually it was so enjoyable that I soon lost all control.
“Fuck me!” I begged. It wasn’t until my sister’s tongue slid into my slit that I realized the words had come from me. But the wetness of my slit, partnered with the power of my moans, told me I didn’t regret the escalation. In fact I literally started wailing when Candi’s tongue began darting in and out of me.
I was stunned by how deep it travelled. Though narrow, the tongue was unexpectedly long. It glided deep into me, hovered there a second, then slid back out. The barbs, which should have ruined an otherwise enjoyable experience, only made my first time with an animal more enjoyable. As did the knowledge that said animal was my sister. I moaned and begged for more. And that was exactly what I got. Before long Candi’s tongue moved so quickly that I could no longer tell when it was in and when it was out. All I felt was an overwhelming sense of excitement. I could feel the orgasm growing within me. And with it the promise of shapeshifting.
“I’m gonna come!” I warned, though I’m not sure who I was warning—my sister or myself?
The orgasm ripped through me moments later. It shook my entire body, forcing squirt after squirt to gush out of my slit. The hot nectar splashed into my sister’s face, but she didn’t seem to mind. She kept purring as her tongue darted in and out of me. I did the same, though I used moans to voice my ecstasy. But it mattered little, because the entire world seemed to have faded away, leaving only my orgasm behind. I continued focusing on it until the final squirt oozed out of me and my trembling body grew still. With one final moan, my first orgasm as an adult officially came to an end.
I lay there for a while, panting heavily. Candi took advantage of this to lick the cum that clung to her fur. By the time my strength returned and I sat up, most of it was gone. Only the drops that clung to her face remained.
Deep down I knew I should be ashamed of my perverse behavior, but all I felt was an overwhelming sense of excitement. Now that Candi had brought me to climax, it was time for me to learn to shift. But first I had to make sure my first incestuous encounter truly had come to an end.
“It is over?” I asked. “Can I shift now?”
Candi shook her head.
“What?” I half yelled, panic gaining me. “You promised!”
By the time the last word left my lips, my sister was back to her original self. I didn’t even notice her lack of clothes.
“I did,” agreed Candi, “but it takes more than just one orgasm to activate the gene.”
My heart skipped a beat. I didn’t know what my sister was about to suggest, but I could tell it would be perverse. Sure enough…
“I just licked your pussy to help you relax, sort of like a warmup,” explained Candi. “Plus, I’m a cat. I like pussy.”
The joke was so unexpected that I couldn’t help laughing. It helped me relax, and I was able to think clearly for what felt like the first time in ages. Though incest—and bestiality—was both illegal and wrong, I was determined to activating my shifting gene. I had come too far to turn back now.
“All right,” I said before I could change my mind. “Let’s do this.”
My sister smiled, but her amusement was only temporary.
“There is something I need to show you first,” she explained. “Please don’t freak out.”
That couldn’t be good. What could possibly be worse than finding out my sister—not to mention my mother, my father and my brother—could turn into an animal at will?
Candi began to transform. I expected something freaky to happen, but she looked just as she had before. Short black fur. A tail. Pointy ears. Whiskers. And a surprisingly massive cock…
“Oh my god!” I gasped as my gaze landed on Candi’s member. It was only a few inches in length and even less in width, yet it seemed quite large for a cat. Not that I had ever seen a feline penis before. I guess that’s why I took a moment so study it. It was pink and covered in spikes. Not to mention fully engorged. I actually found myself drawn to it. But the fact that my sister had a cock was too freaky for me to accept without protest.
“You have a cock,” I said once Candi was back to her human self.
She nodded. She didn’t seemed ashamed, but she wasn’t exactly proud of it either.
“Why?” I asked when no explanation was provided.
“Honestly? I don’t know. That’s just how it works. Male. Female. It doesn’t matter. You will be a male animal when you shift.”
“That’s weird,” I admitted.
“Tell me about it,” said Candi. “Mom and Dad forgot to tell me the first time I shifted. Imagine my surprise when I found out I was a male cat.”
I couldn’t help chuckling. But that didn’t mean I wasn’t freaked out about the prospect of changing sex. At least I would know what to expect. Speaking of which, I had no idea what would happen next.
“What now?”
Candi’s lips curled into a broad grin. “Now I show you how great it can be to have a dick.”
Part of me was nervous, but the rest was surprisingly excited. It’s not every day you get to have sex with your sister. The fact that she was a cat and a male only made it more incredible, and thus more special. I actually felt myself grow wet at the thought of Candi’s cock sliding into me.
“Are you ready?” she asked.
I nodded. Moments later Candi was a cat once more. I watched with giddy excitement as she joined my on the lounge chair. Like before she came to stand between my legs. Only this time she didn’t press her tongue to my slit. Instead, she placed her front paws on my stomach and pressed the tip of her member to the mouth of my pussy.
Nothing happened for a few seconds, then she started purring. Moments later she jerked forward.
“Fuck!” I yelped as every last inch of my sister’s cock flew into me. It was far smaller than Scott—the man who took my virginity—’s, but the fear and excitement that coursed through me kept my pussy tight.
Candi kept her shaft within me for a few seconds, giving me time to get used to it. It was a nice gesture, but completely unnecessary. I had already grown accustomed to the feel of barbs raking at my vaginal walls, so the spikes that ringed her shaft weren’t an issue. The same could not be said about my sister’s apparent unwillingness to give in to her animalistic sexual hunger. Luckily, the arousal that now coursed through my veins had helped me overcome my shyness.
“Fuck me!” I ordered.
Candi was so surprised by my forceful outburst that she stopped purring. But once the initial shock faded the purring resumed. Moments later she began thrusting. The spiked cock glided in and out of me. Slowly at first, but with increasing speed. Before long it was moving so quickly that I lost track of it. But that may simply have been because I was moaning at the top of lungs. Or because the intensity of the incestuous pounding was making my heart race and my back arch. Or simply because a second orgasm was beginning to form within me. It was only a matter of time before it overpowered me completely. And then all hell would break loose.
The pounding continued for… well, I was so overwhelmed by the intensity of my sister’s powerful thrusts that I lost all track of time. The bestial encounter could have lasted mere seconds, like it could have lasted endless hours. I know only that my orgasm eventually became impossible to contain. One second I was moaning and begging for more. The next my entire body convulsed as I experienced the most intense climax of my entire life.
“FUUUCK!” I shrieked as squirt after squirt gushed out of me. Within seconds my thighs were slick with cum. But I wasn’t the only one affected by the onslaught of hot nectar. It clung to my sister’s legs and stomach, drenching her in seconds.
Candi reached the point of no return moments after the cum began spurting from my slit. Her shaft convulsed within me for a few seconds, then squirt after squirt gushed out of it. The semen mixed with my own cum and flew out of my pussy. The feel of it raining down upon me made me moan harder. Even my orgasm intensified. And it continued to rage until the last few drops of strength has been expended. I barely even felt the final squirt ooze out of me. One seconds I was moaning and writhing. The next I was sprawled across the lounge chair, panting heavily.
It took a while, but my strength eventually returned. And with it the excitement at the promise of being able to shift. I opened my eyes to find Candi licking the cum from my slit. She purred as she worked, refusing to give up until every last drop of cum had been lapped up. Only then did she pull away. Shifting back to her human form, she slid along my frame until she was lying atop me. She peered down at me, smiled and pressed her lips to mine. Moments later her tongue slipped into my mouth. But that’s not all that made its way past my lips. A surprising amount of arousal poured into my mouth. I probably would have been shocked had I not been distracted by my sister’s tongue, which darted in and out of my mouth. In fact I was so unprepared for the cum-filled kiss that I didn’t even hesitate before reciprocating her eager tongue strokes.
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