The sister will be the first.

3 days have passed since Katerina got stung by this weird alien wasp, and by now her old self was long gone, now controlled by a parasitic larvae rooted in her brain, its tendrils coming from all over its short body. The possession was now complete as 100% of the brain fonctions were under this new management, soon followed by some changes in the host body. Katerina's reproductive system became a perfect incubation chamber for wasp's egg, and she now possessed a mutated tongue, now hiding as a fonctionnal sting under the visible fleshy muscle, capable of laying eggs she received by the Hive Queen.

Host-Katerina passed most of this time resting, as assuming control and mutating the host was a exhausting task for a young larvae. Being human was an experience so intense for an insect, and being aware of this situation got the parasite confused. Was the Hive really prepared to have human hosts under its control ? Maybe not right now, but maybe a new Hive Queen, born from one of them, would lead the Hive in the path of human enslaving. The thought of a new type of strong Hive got Host-Katerina excited. The urge to feel and touch its host private body parts was too strong, and it masturbated... It didn't even noticed that the eggs the Hive Queen gave it had hatched. Every host could give birth to adult wasps by incubating the Queen's eggs as they need a warm environment to fully developt from larvae to adult. The more hosts a hive controlled, the faster it produced workers and spread, until it reached a stable point of individuals needed to function without issues. The process of completing a hive was really difficult, as parasiting the first hosts needed a lot of luck. But Host-Katerina's hive was superior. It did manage to grow and now was in control of the best host possible. Host-Katerina knew that it species could not comprehend the power it had gained, but it was determined to create the biggest hive ever to help its species thrive. The parasite was planning its plan to take over the rest of the family when something moved inside its mutated womb. Not too long after, 3 adults wasps crawled out its body's vagina, making her moan by the sensation and the satisfaction of its well done duty... It didn't have time to wonder how were the other eggs that it felt larvaes moving through its body, only to stop in the back of its sting's sac, ready to be implemented into some other host body. Everything was going smoothly, and when it heard the front door openning, it was ready.

Host-Katerina was stressed, it never had a conversation with another human since it took possession of this body, and being detected could lead to the destruction of the hive. It took a deep breath and went downstairs to greet its stolen family.

Only the mother and the sister came back from the trip as the father stayed there to help. Katerina's mother will go pick him up in a week, when his job was done. It was great news. Fewer people means fewer risks to parasite them. At first, Host-Katerina only responded in short answers, but the more time passed, the more it was comfortable in conversation, to the point it completly was impossible to anyone knowing the real Katerina to see any difference. The evening and dinner went smoothly and it was time to sleep. Katerina's mother, Solene went first, as the trip back was tiring. But Cailey, the 21-year-old sister, wanted to talk a bit before going to be, to tell all about the private moment she had with the neighbours's son back there in details... It was too perfect for the larvae controlling the redhead. It would be alone with its host's sister, far from the parent's bedroom, free to make its move. Rushing could be dangerous, so it was patient, and waited and waited, to be sure Solene was asleep, and Cailey totally at its mercy...

It was dark in the room, as Cailey was going on and on about her magical night with her lover, and she didn't see that her sister had her mouth wide open, as a long sting was coming out from the bottom of her tongue. She didn't understand either what was happening when her sister jump on her in the weird buzzing sound. Cailey gasped as the felt a sharp pain in her neck.

-"What the f*ck Kate ?! What did you do to me ? That hurts like hell !" She shouted, tears appearing in her eyes.

Katerina never responded, Cailey was confused and scared, but rapidly the brunette felt dizzy, and in no more than 30 seconds, she passed out on her bed.

Host-Katerina was ecstatic, the Hive was growing ! The pleasure its body felt was overwhelming, and without thinking, the larvae directed its soft and still new hands to its host's pussy, and masturbated to the sight of the bulge now visible on Cailey's neck. When its was finished, Host-Katerina snapped back to reality. The girl will wake up in few minutes but the larvae needed more time to grow and move to the brain. Until then the future had to be tied and gagged to avoid any problems. So the redhead put the fragile body of her sister and the belly, and tied her hands in her back with some strong tape. The same was then done to the feet, and finally a clothes was put to suppress her capacity to shout for help.

Cailey woke up about 15 minutes later. At first, she didn't really comprehend the situation she was in. She tried to talk but somethign was in her mouth, then she felt her hands and feet tied. The brunette began to panic and struggle to set her free, when she heard her sister's voice coming from next to the bed.

-"Don't worry, sister. Soon your suffering will end, and your body will be a valuable asset to the Hive," Host-Katerina said, calmly, still aroused by the fact her mission was going so well. "This host got too curious, and I was lucky to get attached to such a wonderful brain. Now one of my siblings will have the same luck," she added, with a grin on her perfect face while a buzzing sound could be heard coming from inside of her.

Cailey panicked even more when other buzzing sounds came from the now openned window of her room. Two blueish huge wasps then fly into the room, and landed on Katerina, visibly comfortable with the insects presence.

-"See how proud they are ? They can't wait to see one of their larvae rooting deep into your mind..."

The brunette eyes were so watery she couldn't see the unhuman smile of the now-gone sister. But all of a sudden, a calm wave came to her, and she started to relax. It was weird. Her sister just stabbed her and telling some weird things, she was tied and gagged on her bed, but felt relaxed. Her eyes caught the wasps again, and more questions came, but soon enough, another wave calmed her down. It was normal, she just had to wait and see, maybe her sister will set her free ? Yeah, she just had to wait, calmly. The room went silent.

Almost 3 hours had passed when Cailey felt and intense pain in the back of her head. Something was digging in. She didn't had the time to freak out that a loud "crack" was heard. Her brown eyes open wide and she tried to scream from the pain. Then her eyes rolled back in her skull and her body thrashed around on the bed, letting gags and moans coming out of her clothes full mouth. The larvae, now fully grown, was burrowing fast in her brain, already spreading its tendrils from the prefontal cortex to rest of the brain. One by one, Cailey's limb were falling under the new management stealing her body. Her last free though were nothing but fear as she felt her consciousness fade away. Only 2min after it entered its host's skull, the larvae had finished its job. Cailey's body fall limp for a minute. Then her eyes openned again.

Host-Katerina stood up and set free her sister, who took a few second to sit, visibly confused by her surroundings. The women eyes crossed, and Cailey tilted her head. She was now part of the Hive.