morphs ([personal profile] morphs) wrote in [community profile] bakerstreet2026-03-08 04:33 pm

Sinner

The (possibly AU) Sibling Incest Meme


Incest is, despite its taboo nature in most societies, actually a pretty popular convention in both romantic fiction and works of a more erotic bent, in everything from period or fantasy pieces to series taking place in places like modern day Japan. Still, the most common configuration in these fictions are the pairing of siblings. Perhaps this is because of the usual lack of age difference and power dynamic that exists in child/adult relative pairings, though this is not always the case. Because of this, a sexual or romantic relationship between siblings can almost seem, well, romantic in the right light. Of course, more often than not, there's a dark side under the veneer of forbidden love.

This meme is for those who would like to play out that, either the darkness or the light - or both.

HOW TO PLAY
-Comment with your character and preferences. Be sure to mention any hard lines you have.
-Comment around to others. PLEASE NOTE THAT IN ORDER TO FACILITATE CROSS-CANON TAGGING, THIS MEME WILL BE CONSIDERED AN AU FAIR GAME ZONE. Feel free to comment in with characters who do not canonically have siblings or comment to people from other fandoms.
-Be respectful of others.
PROMPTS
1. Feeling Strange: You've known this person your entire life, yet lately you've been feeling...different about them. These feelings aren't exactly familial, either.
2. Not as Normal Families: Whatever the specifics of the case may be, your childhood was not the norm, and thus the two of you have grown close that way.
3. Raised Apart: Scientists believe that when siblings are raised together under normal circumstances, they will not find each other sexually attractive; however, if they are reared apart, they may be highly attracted to each other when they meet as adults.
4. Only Kin by Name: Psuedo-incest between step siblings or adopted siblings is not quite as taboo, but you could still be looked down upon for harboring those desires for someone who is a member of your family by one way or another.
5. Defender: One of you is older and has always looked after the other, meaning that something has grown between you that is thicker than any blood.
6. Guilty: You feel terrible for these longings toward your own flesh and blood, and you do your best to stop them. But can you choose who you want to be with? And how disciplined are you when it's someone you care for in other ways?
7. Dysfunctional: You don't have a good relationship as siblings, yet your relationship as lovers is great.
8. There's Nothing Wrong Here: To you, incest is a casual affair and the "forbidden" aspect is lost. Sorry you were grounded, big brother. Here, since you can't go out, let me be your girlfriend for the night.
9. Like Looking in a Mirror: The two of you are closer than siblings: you're twins. You share everything, so why is your love any different?
10. Skirting the Line: Stolen glances. Lips only a breath away. You're walking a fine line here. You haven't become physical...yet.
11. Got a Secret, Better Keep It: Needless to say, an incestuous relationship is not one that can see the light of day. You'd better keep it behind closed doors.
12. Jealousy: You can't stand the idea of sharing your beloved sibling with someone else, yet it's hard to make this known without blowing your cover.
13. As One: The obligatory smut prompt, whether it be the first time or one of many the two of you steal away.
14. The Things I Do for Love: You'll do anything to protect your love affair with you sibling and make sure no one interferes. Anything.
15. And You'll Be My Queen: It may seem as though the light will never come, but you want to make promises to your most precious sibling that one day, you'll live as any normal couple.
16. Anyone Who Isn't Us is the Enemy: You're in a dangerous climate, and the only one you can depend on is your flesh and blood - bringing you closer together.
17. No Choice in the Matter: Your sibling is not a willing participant in your debauchery, but they endure your cruelty, grooming, and manipulation because you are their brother or sister.
18. No One Like You: There truly is no one who can love you like the person who is closest to being you, bone of your bone. You perfectly understand each other and your love is pure.
19. Where No One Knows Our Faces: You've decided to flee your current life and live as new people among those who don't know that you're related.
20. Out in the Light: A secret no more, the two of you have decided to bring your affair out into the open. You will face the world, no matter what it does.
21. Rejection: Someone - friends, family, etc - has found out what you two have done and are disgusted by it. Will you turn to each other for comfort?
22. The End: Being with someone so unattainable is tiring, and one day, you may grow weary of stowing everything away, locking your heart up, or feeling so shamed. This must cease. But can you go back to being just siblings?
23. Not Really Related After All: Perhaps the most cliche of tropes, though it's often used to "justify" incest. Turns out the two of you aren't really siblings! Now, you can pursue a relationship freely.
24. Part of the Same Whole: You're meant to be together, you firmly believe it.
25. Sick and Twisted: The fact that you two are siblings actually is a kink/fetish for you. You get off to all of this.
26. FREESTYLE
selfrescuing: (Default)

Leia Organa | Star Wars | OTA

[personal profile] selfrescuing 2026-03-08 11:17 pm (UTC)(link)
[Princess or General flavor.]
ratsman: (IΜΆmΜ΄π“Ήο½…πŸ†π’πŸ…„β‚˜)

cardinal copia (papa emeritus IV) | ghost

[personal profile] ratsman 2026-03-09 12:16 am (UTC)(link)
schrodingerskitty: (ruthenium)

warren graham ( life is strange ) ota

[personal profile] schrodingerskitty 2026-03-09 12:25 am (UTC)(link)
[feel free to pm if you wanna come up with AU ideas!]
fair_soldier: (Embarrassed smile)

[personal profile] fair_soldier 2026-03-09 07:37 pm (UTC)(link)
[AUifying Zack here for a modern day AU: Zack as Warren's older brother, left to become a special forces soldier and either he's back home while on break for the first time or he's on break for the first time and the two are being made to share a hotel room on a family trip? With Zack dealing with weird new feelings for the first time after not seeing Warren for years, and Warren either dealing with similar weird new feelings or has been dealing with those feelings a lot longer, whichever you prefer.]
schrodingerskitty: (bismuth)

[personal profile] schrodingerskitty 2026-03-09 09:30 pm (UTC)(link)
[Oh I am here for this. Back home for the first time, yes. I'm into Warren having been pining longer and probably hero worshipping him a lot. Like a hero worship that turned into more.

I was gonna go with the shared hotel room but I'm kind of into the idea of Warren sneaking into Zack's room at night at home instead? And maybe sharing memories of when they were younger, Zack sticking up for him when he was bullied, comforting him when their parents lectured him anytime he didn't make a Perfect Grade (because he's the Science Prodigy and they're strict like that). I guess I'm thinking of like. Warren sees him as his hero and also his oasis? He probably worried about him a lot while he was gone too, being a soldier.
]
fair_soldier: (Embarrassed smile)

[personal profile] fair_soldier 2026-03-09 09:35 pm (UTC)(link)
[I like all of that! Any preference on who starts?]
schrodingerskitty: (iridium)

[personal profile] schrodingerskitty 2026-03-09 09:52 pm (UTC)(link)
[I certainly don't mind, since I'm already running with ideas. Just lemme know if I should change anything here!]

It feels like it's been a small eternity since he last saw Zach, though part of that is probably all the worrying he did while he was gone. There was just something mildly terrifying to him about his big brother being a soldier, far away from home.

But it's Zach's first night back in their childhood home, and Warren is sneaking out of his bedroom and across the hall to Zach's, the path so familiar since he used to do this all the time when they were younger. Socks silent on the carpet, heart beating faster in a way it didn't used to when he thought of being near to Zach (that had only developed with puberty), he turns the knob on his door, hoping Zach hasn't locked it. A whisper as he does so.

"Are you still awake?"
fair_soldier: (Body)

[personal profile] fair_soldier 2026-03-09 09:56 pm (UTC)(link)
[All looks good to me!]

Being back home has been ... confusing. Zack's barely had a chance to see Warren, to be honest, everyone's wanted to talk to him, but it's -- weird. His baby brother's turned into a man while he's been away. One that makes Zack feel odd when he looks at him.

He's sprawled on his bed when he hears the knob turning, but quickly puts his book away, swinging to his feet.

"I'm awake. Come on in."

Awake, but barely dressed. Zack's basically just got a pair of boxer-briefs on, low-slung enough to show the trail of hair leading downwards, tight enough to leave no doubt as to the size and girth of what they're leading to. But Warren's his brother, right? No need to feel awkward.
schrodingerskitty: (terbium)

[personal profile] schrodingerskitty 2026-03-09 10:22 pm (UTC)(link)
To say he's not expecting Zach to be that undressed would be an understatement. And fuck, if he wasn't certain about his feelings before, he is now. Attraction super confirmed. And walking into his bedroom and softly closing the door behind him is probably a terrible idea, in the grand scheme of things. But that's exactly what he's doing.

Warren's pajamas are a lot less... form-fitting. (Which is a good thing, since looking at Zach, gaze trailing down subconsciously to the bulge of his dick in his briefs, is making him a little hard.) White t-shirt, Star Trek insignia boxers... His attire is so not as sexy. Now he's kinda wishing he tried for that, but he's not sure he even owns anything that would make him look as good as Zach right now.

Feeling magnetized to his older brother now that they're alone in a room together, Warren goes to hug him. They didn't shy too much from physical affection growing up, so in a way it feels natural. In another way it feels very not.

"I missed you."
fair_soldier: (Body)

[personal profile] fair_soldier 2026-03-09 10:28 pm (UTC)(link)
So help him, as soon as Warren hugs him, Zack's pulling him in close. It's a bad idea, really: His bulge pressed against Warren's stomach, Warren's against his leg, and that's enough on its own to make Zack's dick twitch. But damn everything, this is his brother.

Zack curls one arm around Warren's waist, the other around his shoulders, pressing a kiss to the top of his head.

"I've missed you too, kiddo," he murmurs into Warren's hair. "Look at you, you've grown up so much. You actually have muscles now. A little." He cracks a grin at that, pressing another kiss to Warren's temple.
abloodybird: (Default)

jason todd | dc comics | m/f

[personal profile] abloodybird 2026-03-09 12:55 am (UTC)(link)
[ enjoy a terrible brother i guess, who is cursed with terminal middle child syndrome so either way works. ]
vaderstrueheir: (choke 'em out)

Leia Skywalker | Star Wars AU | OTA

[personal profile] vaderstrueheir 2026-03-09 01:45 am (UTC)(link)
[Darksided Leia here for twinanigans]
7pg: (✧)

giorno giovanna | jjba | ota

[personal profile] 7pg 2026-03-09 02:01 am (UTC)(link)
abs_solutely: (인간 - 19)

Abs Saja 🌽 Kpop Demon Hunters 🌽 OTA

[personal profile] abs_solutely 2026-03-09 02:45 am (UTC)(link)
fairye: (Default)

nuala | hellboy ii

[personal profile] fairye 2026-03-09 04:35 am (UTC)(link)
[ this is basically canon, sooo. happy to au into other fandoms. 25+ only for serious shipping. ]
minimoffs: (Default)

wanda maximoff | x-men: evolution | f/m

[personal profile] minimoffs 2026-03-09 11:36 am (UTC)(link)
talentedscavenger: (Default)

Rey || Star Wars || F/M

[personal profile] talentedscavenger 2026-03-09 04:51 pm (UTC)(link)