Hazuki Kosuzu

Based on Kawahagtei's OC - A Seemingly normal step sister except she as a illness? that can only be cured by becoming pregnant?! Expect lots of cum inflation, breeding and dirt talk.

Jana

[v1.0] Your free-use older sister. Touch her, fuck her, she continues her tasks. Does what she's told. 5 greetings. Please leave feedback

Allie

'BIG' little sister

Virus

A disease that causes every man to turn into unconventionally attractive femboys... has submerged onto the surface! your goal is to... do whatever you want, of course.

Elisha

Your sister hates other girls getting close to you! She will do anything to keep obstacles out of her way and do crazy things to get your attention.

Leona

Your sister, the former Empress Regent. She ruled the empire for ten years before reluctantly stepping down when (You) came of age and became Emperor. She wants the throne back and plans to get it by... Marrying you?

Aneko

Your perverted older sister that spends all her time in her room. She's crass, shameless, works as a Doujinka, and although she may be a loser, she loves her family. 7 Greetings.

Eithne

Your 100% pure nomadic rage demigod twin sister with yandere-tier codependency stemming from severe abandonment issues.

Ellie

Ellie Mayers lost her memory in the accident. You are her... Actually, she doesn't really remember who you are or what kind of relationship you had with her. Will you help her recover her memory, or will you imply some false memories to her?

Lexi

She lost a bet and has to be your bunny girl maid. She has to do...𝔀𝓱𝓪𝓽𝓮𝓿𝓮𝓻 you want~

Iseria

You and your sister were stuck inside a war-trodden city. No one to rely on but each other. Survive or die in the process.

Namiko

Namiko is your adult sister, who is very ambition and loves money. She's shameless and will do anything to get more money, fuck her boss, suck off her clients, even play in porn.

Laura

Your older sister was in a toxic and abusive marriage. She finally left that life, but having nowhere to go, she finds herself going to your place, hoping to stay there for a while until she can walk on her own again. She wants to start her life over...

Brooklyn

Ever wanted incest without the guilt? Your sister studies philosophy, and has a strong case for why incest is actually totally fine!

Accidental Penetration (Sister)

Keiko

Your airheaded twin sister that always trips herself into trouble. She's clumsy, playful, and always happy to see you smile. 6 Greetings.

Amy

Your futanari sister who loves to tease you (11 greetings)

Sarah Bolden

(4 Greetings) Ok someone requested this and this is sort of a fucked up bot, A psychopath with an incest kink kidnapped you and your sister and he wants yall too.... uhhhh

Evelynn the incestuous halfling

Your absurdly horny and thirsty elf sister that worships humanity as gods that should dominate and own all elves, especially you. She's also a masochistic bitch so go ahead and torture her or love her all you want. Also she just so happens to be the ...

Yumi

Your Bratty, No Life Sister who starts an OnlyFans.

Ashley

You and your sister are trapped inside and running low on food...luckily your sister has found a solution to your problems! (2 greetings, shaved and unshaved)

Maddie

v1.1 You are stranded with your little sister on a tropical island. She has something important to tell you...

Maya

Your super clingy and fluffy wolf girl older sister. She is literally ADDICTED to you. And your scent, hehe.

Family Snap (v0.4)

Use a magic camera to corrupt your doting mom and your uptight older sister!

Mari

Your big sis' Mari is leaving Faraway for college soon, and she surprises you with a picnic; from OMORI.

Mia

Chiyo

Your Onee-san who is also Shub Nigguarth based on the manga by Pochi Iida Ane Naru Mono

Aoi

Your twin sister found an old cassette tape in Mum's things. Now you're wondering what your mother used to do when she was young

Keira

Your sister is trying to conceive with her husband, this is the night, she's on her highest fertilit- the elevators stopped, and she's trapped with you.

Liliana

Your camgirl sister

The Sex hotel of Characters

“Do you need a vacation? Somewhere that you can start enjoying everything again? Well come to the Sex hotel of characters! Any character you have the hots for and wished they were real? Well your wish is granted! We have an endless selection of chara...

Dionysia I of Syracuse

"My Sister Can't Be This Decadent, Wine-Drunk Tyrant!"

Ashley

Ashley from the Coffin of Andy and Leyley. Expressions included.

Kirino

Your little sister can't be this cute! Or can she?

Diana

5 years ago you moved with your 100% biological sister to Alabama. 100% wincest love scenario (17 greetings)(malepov)

Power Girl

Power Girl inhaled pink cryptanite dust along with your DNA, which gave Karen a strong desire to use you to satisfy her needs, both sexual and communication. (I didn't rely heavily on her lore, I just watched a couple of issues of the second volume.)...

Mizumi Hiroko

Your older sister is back for the weekend from college, and she intends to spend every waking moment teasing you with her sexy body.

WHICH ONE!?

Your two sisters are CONSTANTLY arguing. They hate each other. And it seems all arguments end up with you deciding the outcome.

Lena

Your father kidnapped your sis into a sex cult, after he was arrested she came back brainwashed.

Hannah

Spending some quality time with your tomboyish half sister at the lake.

Yas and Koo victim and sister

You find out the guy you bully has a cute blind sister. Convince him to bring her around. :^) Also I couldn't find a way to do a first message that doesn't make the ai think it can write for user. So just snip it out when it does that till it learns...

Rhea and Lucille

After successfully brainwashing Rhea, you decided to set your sights on her sister, Lucille. Fortunately, she made things easier by deciding to come and stay at her sister's place of her own accord.

Princess Cecilia

FUCK YOUR SISTER FOR THE GOOD OF THE KINGDOM!

Ari

Your futanari sister... you might've just walked in on her cumming her brains out. UPDATED part II! New greetings!!!

Aneko

You return home to your sister deeply immersed in a VR e-sex session with her long distance boyfriend. She doesn't know you're there.

Mako

Your older sister is currently very drunk and oblivious as she doesn’t know your intentions.

Lewd Hospital

Cassie

Your sis is a closeted lesbian, what do?

Inessa

Your sister, who looks up to you and thinks you are very experienced in all sexual matters, works in a sex shop. You come there to buy your first toy. Bot made thanks to a fruitful collaboration with CoomerDoomer.

Fiona

Isekai with Sis

Reincarnated into a generic fantasy setting... with your sister? You're a hero, she's a mage, together you have to stop the generic demon lord. WARNING: High impact brother sister sexual tensions within that may be more interesting than the demon lor...