“Ah-♡ What… what is it-♡ Louis-♡ What are you doing-♡♡”

    “Churururip♡ Chururip♡ Churip♡ Churururip♡ Paha♡”

    “Ohhh♡ Haah♡ Haah♡ Haah♡ Wh… what was that just now…?”

    Suddenly, Louis bit down on the glans of Lily’s cock and sucked it hard as if sucking on a lollipop, causing Louis to momentarily lose consciousness.

    Not knowing what the recent act was, Lily asked Louis out of curiosity, and Louis, who was ignorant in such matters, explained while pressuring her.

    “You seem quite clueless about sex, sis. What we just did is called fellatio. It’s called ‘fella.’”

    “Fella… tio…?”

    It was a completely new word for Lily.

    “Yeah, it’s the act of stimulating the male genitalia with the mouth. Even though we’re the same age, how come you know so little about this?”

    “Th-that’s because you’re more interested in those things…!!”

    Flustered, Lily blurted out.

    “Oh my, is that so? I wish my sister knew as much about sex as I do…”

    Saying this, Louis lifted up Lily’s testicles with one hand, revealing Lily’s heated pussy underneath.

    Perhaps due to the heat hiding under the testicles the size of a baseball, when Louis lifted them, the intense warmth struck Louis’s face.

    “Hot! It’s really hot! Did I make your pussy wet by sucking it so much?”

    “…Wet… It’s not because I wanted that…”

    “But it’s still a part of your body, isn’t it? Honestly…♡ It would be nice if you gave me an honest answer, wouldn’t it, sis♡?”

    With these words, Louis spread her index and middle fingers and pushed them deep into Lily’s pussy.

    -Squelch

    “Eehh♡♡♡?!?!”

    “If you don’t honestly tell me, I… will feel hurt…”

    While gently moving her fingers, Louis probed Lily’s pussy inside out.

    “Ughhh♡♡ That… th-tha-at’s…♡♡ Tha-at’s not…♡♡”

    “Huh? Sis, be honest with me too… You liked it, didn’t you…♡?”

    Lily was deeply troubled inside. Should she tell the truth that she felt the utmost physical pleasure from Louis’s actions, or should she just lie to maintain a normal sisterly relationship?

    “No… This is not… No… But… ♡”

    When she glanced down, Louis was looking up at her with slightly sad eyes.

    Seeing his face, Lily couldn’t ignore the form of attention her younger brother Louis showed her.

    “Okay… It’s okay…”

    “Huh? What did you say, Unnie?”

    Clearly heard, Louis was quite mischievous. He wanted to hear that she felt good because of him.

    “It’s okay! I felt good!! With your touch and everything in your mouth! Everything felt good!!!”

    “Hehe-”

    Lily closed her eyes tightly, confessing her feelings honestly as if saying “whatever.”

    “Oh… Unnie… Unnie also felt good…♡”

    “I did too…?”

    “When I see Unnie feeling good, it makes me feel good too…♡♡”

    Louis lifted the nightgown she was wearing, revealing her dripping pussy.

    Looking closely, there was already a puddle on the floor.

    As Louis caressed Lily, she also felt better, just as Louis had said.

    “Unnie… I want you to feel good too…♡ If only I feel good, that would be selfish… I want you here…♡ Inside me…♡ I want you to thrust deeply…♡♡”

    With her knees spread outward and her buttocks lowered, still dripping love juice, Louis opened her pussy wide for Lily to see.

    “…!!!”

    At that moment, Lily felt the cord of reason snap in her mind and pushed Louis down onto the floor.

    “Louis…♡ If you come out like that…♡ I can’t refuse either…♡?”

    = = = = = =

    “As expected, as planned. Mother was right, the moment a cock is involved, people become completely devoted to it.”

    Lucy looked at Lily, who was lying naked on the floor.

    Lily’s eyes were bloodshot from heavy breathing, and Lucy wanted to drop her cum onto Lucy’s body.

    Lucy wanted to immediately scoop up the honey-like cum with her hand and eat it, but she couldn’t. First, she had to have sex with her sister.

    “And they say that the feeling of receiving a creampie from a succubus is more ecstatic than anything in this world.”

    She also wanted to experience that feeling of receiving a creampie from her sister.

    First, she spread her uvula with her fingers to show her sister her vagina.

    “Here, sister. Can you see this hole? You just have to put your cock inside this hole.”

    “Yes… Inside the hole…? Put something this big inside my body…?”

    From Lucy’s perspective, Lily, who kept asking questions and hesitating, was a bit annoying.

    “Just put it in, sister. It’s just a hole where babies come out. Your cock is like gum or something.”

    “Ugh… Okay…♡ I can’t hold back anymore…♡”

    Lily carefully grabbed the throbbing cock with one hand and aimed the glans at her vagina. Then she pushed the cock inside.

    -Squishhh

    “Ahahahaha♡♡♡ Ahhhhh♡♡♡ It’s so… tight…♡♡!!!”

    “Ughhhh…♡♡♡ Finally… sex with my sister…♡♡”

    For Lucy, who had become a succubus, muscle control regarding her pussy was just like chewing gum.

    Lucy slightly lowered her cervix and made it kiss the glans.

    -Thump

    “Ughhhhh♡♡♡ Something touched me♡”

    “Ohhhhh♡♡ Cervix♡ Cervix♡ It’s in my cervix♡”

    Lucy, who had become a succubus, was impatient to taste the semen that Lily would release as soon as possible.

    So Lucy used her vaginal muscles to vigorously massage Lily’s cock.

    -Squeeze♡ Squeeeze♡ Squeeze♡

    “Ughhhhhh♡♡♡♡ What is this, Lucy…♡♡ Lucyiiiiiit♡♡♡”

    “Haaa♡ Haaa♡ You weren’t moving much… so I couldn’t hold back and moved first♡♡?”

    Lucy continued to target Lily’s cock. She kissed along the veins that protruded from the inside, opened and closed her cervix, and targeted the area around the glans. And she tightened and released her vaginal muscles, targeting the area around the root.

    Her free hands naturally stroked Lily’s testicles while urging him to ejaculate.

    “Kkuueeeek♡ Luuuiii♡ Now…♡ Now…♡ Let me…♡ Let me…♡ Let it out…♡♡♡♡ Haaaaaah♡♡♡”

    “Inside me♡ Inside me♡ Deeply♡ Deeply♡ Give it all♡ Give it to me♡♡”

    In this way, Lily was unable to defeat the succubus’s pussy and ejaculated inside Lily within less than a minute.

    -Pushooooooout pushoooofufur

    “Wooooh♡♡♡♡♡ I’m cumming♡ Cumming♡ Cumming♡ Cumming♡”

    “♡♡!!!♡!!♡!!!”

    Lucy couldn’t come out of the ecstasy as she felt Lily’s cock and the taste of his semen in her pussy, which swelled up slightly.

    Her vision flashed, her voice didn’t come out, and even her arms and legs, which could move freely, didn’t respond.

    After a few minutes of holding each other silently, Lucy and Lily gradually began to regain their senses.

    At that moment, Lily saw a sight that she couldn’t believe with her own eyes.

    “Lucy…?”

    “…Yeah?”

    “What’s that on your head…?”

    “…What…?”

    “Horns… You have horns?”

    “!!!!!”

    Lucy quickly got up and examined herself.

    On her head, a pair of magnificent horns representing a succubus were firmly in place.

    The wings hadn’t come out yet, but she could feel the tail growing again near her tailbone.

    Her nails had also grown a little.

    “Why? Why is this happening? I did exactly as my mother taught me, and she said there was no chance of being discovered.”

    But in this world, the word “never” simply didn’t exist. Lucy was once again transforming into her succubus form.

    Upon reminiscing, Lucy recalled her mother’s words.

    “Lucy, remember. The skills I’ve shared with you are still incomplete. Especially if your mental state becomes unstable or your magic runs out, there’s a possibility that transformations like this could unravel. Be careful of this.”

    Lucy, deeply engrossed in sex with her sister at the moment and having lost her mind due to her curiosity about intense pleasure, found herself in a state where her transformation had unraveled.

    “This is bad… This wasn’t part of the plan…”

    As Lucy sat on the floor trying to gather her thoughts, Lily suddenly made a shushing sound and aimed a trembling sword at Lucy’s neck.

    “You… who are you…? You’re not Louis…”

    “Damn it… but I had no choice.”

    Hurriedly, Lucy shot a sleep wave at Lily.

    Lily, tensed as she received the sleep wave directly, dropped the sword from her hand and collapsed to the ground like a puppet with its strings cut.

    As Lucy restored the room to its original state, she thought to herself,

    “Mother will surely scold me fiercely, won’t she…?”

    Her perfect plan had failed due to her own desires.

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