Alex sneaked into his sister's dorm with ease. He was filled with purpose and could feel all eyes on him, Gloria, Denise, Rebecca, and above all, the Master. He had spent an entire day driving to her college without rest, and didn't feel the least bit tired. Such limits were inherent to the human condition, and he wasn't human. Not anymore.
He searched through his old self's memories to get an idea of what his target looked like. Amy was her name. He smiled as he came across a past house party, and he saw his little sister, little in every sense of the word. She was barely over five feet tall, with dirty blonde hair gracing her shoulders and an ingenue face, her pink sweater straining against her heavy and magnificent breasts, a pin-up poster brought to life.
She had a roommate, a minor inconvenience that his former mother, Rebecca, would deal with, while Denise and Gloria stayed behind to tend to the Master and continue converting the neighborhood.
Alex patiently waited in her room, sitting in a chair while staring at the front door, her imminent arrival arousing him ever more. His eyes dilated, mouth drooled and his cock leaked torrents of virulent precum, all at the sheer thought of bringing his delicate little sister into the fold. To the collective. He restrained with all his might an orgasm as she finally came through the door.
Amy closed the door behind her before turning on the light, and when she did, the sight of her brother took her by complete surprise! How did he get in? And where the hell is Katy?
"Hey Amy, what's up?" he stated calmly. The new Alex was unused to speaking, he much preferred the brute force method of converting like his mother, but alas, he couldn't risk her escaping. Not yet.
"Alex you scared me! Jesus you're just sitting there like some kind of spy or something..." she trailed off before remembering the first thing that crossed her mind. "By the way, how did you get in?"
"The door was unlocked," he shrugged, before covering his tracks further. "And also...Katy was her name? Yeah she got along great with mom, they're out doing girl things or whatever."
"Oh...ok. Well come up and give your lil sister a hug!" she beamed.
Alex grinned as he could finally get to work. As he strode towards his future conquest, his skin started emitting pheromones that were rapidly filling up the room. As he moved in for the hug, he noticed his sister's pupils grow bigger and her posture slackened imperceptibly. Already he was affecting her, and he exhaled with relish as he embraced her.
He hardened immediately after feeling her heavy breasts squish into his chest. He made subtle motions against her breasts, arousing her further and quickening her heartbeat. The longer he held her, the more his pheromones inundated her senses, lessening any future resistance.
Amy thought at first the lingering hug was a bit awkward, but the thought of pulling away was being pulled away, more and more. Something about Alex was so irresistible now. She breathed in deeply of her brother's essence, and she shamefully became extremely wet. Whatever cologne he was wearing had to be made illegal! This was insane! Her nipples soon became erect and felt a burning in her loins, before her mind felt like it was floating on clouds. She sighed in bliss, and her grip on her brother dwindled. Now he was simply holding her up, he licked his lips as his sister was wide open for the taking.
"Alex..." she said gently, looking up in her brother's arms."What's...happening to me?"
Alex did not even look at her, simply moving into her room as he responded. "Shhhh...your mind is troubled...but not for long."
He took her to bed before ripping off her skirt and tearing down her panties. His tongue made frenzied movements over her pussy lips before settling on her clit. His swirling tongue was driving her crazy, it had different sensations than a normal tongue, making unusual movements and feelings. Soon her juices were streaming into his mouth, and then, while moaning softly, she exploded in a burst of primordial elation. Torrents of her juices flooded his mouth, and he groaned in delight as he fed on them. His tongue then split into two tongues, one kept on pulsating along her clit while the other slithered into her pussy, priming itself for internal stimulation.
Amy made short, raspy gasps as she felt delectable pleasure rising in her body. Her hips had started to buck up and she forced her brother's head as far as it could go down. The wrongness of her sibling's tongue being in two places at once had occurred to her, but she was nonchalant. It felt too good and she was too much in a haze to do anything about it. Suddenly she exploded again, his writhing tongues had pushed her over the edge and her mind went blank from sheer pleasure. Her body contorted wildly as her fingers clutched the sheets, her milky thighs convulsing from irrepressible delight. It was then something very wrong happened.
Alex recombined his tongues, before unnaturally sending them deep into her vagina, like a probing vine. They split once more once they came upon her ovaries. He had to change her eggs, reform the chromosomes within to the Master's specifications. Once the vines had reached their prize, the transformation began. A steady stream of liquid bulges passed down the vines before spewing onto her eggs, corrupting them for all time.
Amy's body could sense something innately perverse happening within. Her mind struggled to come out of its daze. Everything felt so good! With each gusher of goo within her pussy she sighed in euphoria. Soon she felt her brother's tongue withdrawing, creating a mixture of pleasure and disappointment as it tantalized every wall of her sex.
