“Yes, my little Princess. You’ve been off the pill for two days now. I switched them the first morning.” I immediately saw it. The memory of finding her purse on her bed, with her pills in the wrong compartment flashed into her mind. “Do you want to be my good girl and help me get back at your Daddy? Just imagine being knocked up by me. He could never do that to you. Could never reclaim you. If you carried your little brother’s baby, you’d be forever mine!”
“Yours!” she panted. “Forever yours! All of me, yours! No pills. Unprotected! Pregnant with yoUR BAAABYYYYYY!!” she wailed, unceremoniously dropped the bag with the pills like they no longer mattered to her in the slightest, and her whole body started violently shaking as her eyes, once again, rolled into the back of her head.
“I’m coming, Princess. Your little brother is coming into your unprotected fertile womb! I’m fucking a little baby into you!” I grunted, as I exploded inside her.
Hearing my words, and feeling me erupt into her canal, she screamed like a banshee that hit her toe against the kitchen table, and her fingernails were painfully digging into my back as her hips lifted off the mattress and quaked around my twitching cock. Then her scream ebbed away until she was absolutely quiet. It seemed like she had an earth shattering orgasm. Her hips dropped back to the mattress and her back arched off it, as she started thrashing around. Her mouth was still wide open with suspended breath. She went off like that for half a minute before she finally collapsed a second time as a babbling and sobbing mess.
I held her hips tightly pressed into my groin, as I squirted spurt after spurt of my hot cum into her depth, all the while feeling her folds ripple around me, intensified by the vibrations of the plug. I relished in my triumph, and that only heightened when I realized that, even after unloading into my sister for the second time, there was still no sign of my dick going back to sleep. So, I simply kept going!
I kept plunging into her while she remained powerless underneath me, continuously blubbering unintelligible sounds. Though they did sound like she was enjoying herself, even encouraging me to keep going, I mostly enjoyed the notion of leaving my big bitchy sister as a basically braindead fucktoy. With every collision of our groins, I could see the impact travel up her body and cause her breasts to jump. It was heaven.
When I felt my balls stir again, and informed her of my seed’s impending arrival, she simply nodded with a big silly smile on her face that prevailed even after I had stopped jerking on top of her.
Without even bothering to pull out of her, I dropped my weight onto her body, wrapped my arms around her, and turned us both around so she would lie on top of me. Then I started fucking upwards into her as best as I could with her lifeless body restricting me. It took her merely a moment before she started squirming back into consciousness and I heard her tired voice.
“Still hard! Not stopping! How!?” she panted, confusion evident in her voice and expression.
“Oh, Princess. I intent to fuck you senseless tonight! I need to deposit a few extra loads inside your pussy, just to make sure this works! And when that’s done, I’ll still have to fuck your tight little ass!” I grunted, and she immediately started moaning again.
When it looked like she had fully regained her senses and surrendered to her fate, she planted both of her hands to either side of my head and pushed her torso up, before she started to ride me like a cowgirl.
“Do it! Fill your big sister up! I’ll do anything for you, little brother! Anything to make you happy again! I’ll be your good girl to breed! Paint my insides with your seed and make my belly swell up!”
The words she chose surprised and concerned me. I stared at her with uncertainty, wondering whether she just had a breeding-fetish like I had suspected since our first get-together, or if my plan had just massively backfired and her submissive tendencies took a hard turn for the worse.
Hopefully she just got off on breaking the greatest taboo imaginable, after that bar was raised quite high by what the family had already established as normal. In the end, it all depended on whether or not she knew about the fake-pills being fake. But I put that off until the next morning, since, for the moment, I just wanted to enjoy myself.
Encouraging me with the most depraved language imaginable, continuously painting a picture of all the things I could do to her while she lived in my home carrying our baby to term, she didn’t last long before she started shaking again and a deep flush spread over her chest. I had to push and pull her hips so she would at least continue to grind herself back and forth. It was enough, however, and I eventually followed her example and felt myself come again, even stronger this time than before. This time, it was me who lifted his hips off the mattress, trying to penetrate her as deeply as possible, and lifted her a little off the bed as I shot my third load inside her.
Once I had regained control of my muscles, I decided that I wanted to properly watch my cock invade her, so I pushed her off me and onto her stomach, moved in between her legs, grabbed her hips, and pulled her ass up. Her arms limp and useless by her sides, she released a quiet whimpering sound as soon as she realized that I still would not allow her any rest. I really didn’t care, and as I rammed myself into her from behind, her whimpering slowly evolved into a continuous throaty groan.
Over time, my speed increased, as did my grip on her hips, and I could hear wet splashing sounds from our connected groins with every thrust. Looking down, I noticed that my cock was covered in a white, frothy substance that was also running down her legs. Our bodies were covered in sweat, it was even dripping down my nose. Ava was by now producing sounds that alternated between moans and sobbing cries, and I fucking loved it! I loved the sounds she made, I loved watching the ripples going through her buttcheeks every time I roughly slammed into her, I loved how I could just use her however I wanted, and I loved how my dick hurt because I knew what caused it.
Having already come four times allowed me to fuck her in this position for a long time, but I ultimately realized that I couldn’t keep this up indefinitely. In fact, I had been fucking her nonstop for little under two hours now, and had felt her quivering canal clamp down on me several times, though the vibrator in her ass made it impossible to know for sure if those were orgasms.
Somehow, I just knew that I wouldn’t be able to stay hard after my next shot. It was time for the finale. I turned the vibrating function of the plug off and slowly started extracting it from her rectum. I had only tried anal with Tess once, since she said I was too thick for her. Ava, however, had said that I could do anything, als long as I didn’t hurt her ‘too much’.
As soon as the plug had vacated her anus, I decided to use a generous extra amount of KY to make sure I wouldn’t injure her. Then, I slowly worked the head of my cock into her barely stretched butthole, as she weakly stirred underneath me. When my tip had finally passed her sphincter, I let my fingernails scrape over her back, up to her neck, and finally weaved my spread fingers through her hair. I grabbed it by the roots, remembering how Tess had complained about pain if I pulled her hair any other way, and yanked Ava’s head back so she could look at me.
Her face was picture-worthy! Her eyes remained unfocused and wouldn’t open fully, her mouth hung slack open, and, to my greatest amusement, a steady stream of drool was running out of the corner of her mouth and down her chin! None of that changed much as I pushed myself deeper into her ass while pulling her torso up by her hair. Her eyes just fluttered, as she produced unintelligible guttural sounds.