#microcest

[microcest]

Microcest Prompts as of May 2026

(All of our prompts can be filled at any point in time!)

001. shh… don’t let mom hear 002. family movie night 003. separated at birth 004. sunday morning mass 005. sharing a bathroom 006. testing how affectionate they can act in public 007. wrestling/tickle fight 008. let’s play pretend 009. caught getting off while forced to share the same bed 010. “Have you ever done this before?” 011. on display 012. body swap 013. blind date 014. romantic leads in a play 015. camping trip 016. bathtime 017. playing doctor 018. wrong number 019. welcome to the family 020. hidden camera 021. toy box 022. blackmail 023. bunk beds 024. prostitution 025. glory hole 026. playing house 027. inspection 028. black cat OR bestiality 029. bite me OR cannibalism 030. haunted house OR noncon 031. costume OR necrophilia 032. peeping tom 033. that isn’t mine 034. like father, like son 035. I never knew 036. undercover 037. de-aged 038. why is your family like that? 039. Traditions 040. Time Loop 041. genetic test results 042. genderswap 043. incest chicken 044. Can I ask you something? 045. I dare you 046. candy hearts 047. curse 048. What about me? 049. tucked in 050. I'm stuck 051. ...in front of your parents? 052. happy birthday 053. keep your eyes on me 054. ask nicely 055. Do you want more? 056. taste test 057. sacrifice 058. suspension 059. stranded 060. just the tip 061. first & last 062. new look 063. worship 064. poisoned 065. sleep walking 066. you're distracting me 067. applying each other's sunscreen 068. teddy bear 069. sixty-nine 070. skinny dipping 071. come home 072. parent didn't show up but sibling did 073. use your words 074. gray hair(s) 075. doppelgänger 076. see-through/x-ray vision 077. mind control 078. helpless 079. changling 080. close your eyes 081. possession 082. hallucination 083. necromancy 084. I don't trust anyone else 085. that's mine, take it off 086. your family is really close 087. won in the divorce 088. what is in your hand? 089. turned into a sex toy & used 090. need a date/plus one 091. one of these gifts is not like the others 092. we're running out of time 093. you're not ready 094. dating people that look exactly like their family member 095. numb 096. hiding in the closet/hiding under the bed 097. kiss cam 098. secret valentine 099. waking up in the hospital 100. securing the bloodline 101. two-way mirror 102. in training 103. you knew this whole time? 104. birthday suit 105. fooled 106. getting off to their voice 107. didn't hear you come in 108. Bring Your Child To Work Day 109. overprotective 110. all or nothing 111. "Don't make this weird." 112. carnival 113. argument turns sexual

I will try to update keep this list up to date on Dreamwidth!

[cassetteinability]

@microcest / @macrocest prompt: “that isn’t mine” / 621 words / tw incest duh

also added to ao3 here

“What is…” Sirius slid his leg back and forth between his sheets again, his foot catching on a stray piece of fabric again. He hooked it over his toes before dragging it up to the opening and transferring it to his hand.

It was a pair of boxer briefs, green with a grey waistband, and definitely not Sirius’.

“Regulus!” Sirius called, not wanting to get out of bed, and knowing his younger brother was still awake in his own bedroom. “Reggie, come here!”

“What?” Regulus asked as he stepped into the doorway, expression and tone equally bored. He was dressed in nothing but a pair of pajama pants, a book in his hand with his index finger squished between the pages to hold his place.

“Why are your underwear in here?” Sirius asked, holding up the offending article of clothing to show Regulus. There was a damp spot at the front, dark and stiffening, as if Regulus’ cock had been leaking at the tip before he finally kicked them off, like maybe… “Did you fuck someone in my bed?”

Sirius willed his heart rate not to spike at the visual, silently begging his own dick not to grow hard at the thought of his brother writhing around in the exact spot he was currently laying in.

A blush crept up Regulus’ cheeks at the accusation, but he shook his head all the same. “No, Sirius,” he said, tone suddenly patronizing. “I didn’t fuck someone in your bed.”

Sirius looked at the underwear in his hand, thought about the way they had so clearly been pushed off under the covers in a fit of rushed desperation, and wondered if Regulus had left them for Sirius to find, or if he had simply forgotten them.

“Did you—” Sirius felt his voice break and paused to take a deep breath to steel himself. “Did you jerk off in my bed, Reggie?”

Regulus let out a soft, embarrassed laugh, looking away from Sirius’ gaze. “Of course not, Sirius.” The words were soft, devoid of emotion, and clearly a lie. Regulus wasn’t trying very hard to hide the truth of what he had done.

“Why in my bed?”

“It smells like you,” Regulus replied, his blush spreading further down his face and across his bare chest, but there had been no hesitation in the words.

Oh fuck.

Sirius clenched his eyes shut and dragged in another deep breath. His heart was racing, even as he felt all of his blood rush to his cock at the insinuation.

“You think about me while you touch yourself?” Sirius asked, opening his eyes to look back up at Regulus. He knew his own pupils would be blown wide, lust-crazed and desperate, but it was Regulus that had started this. It was Regulus’ desperation that had led Sirius to realize the thrumming need under the surface of his skin, and Sirius knew Regulus wouldn’t reject him.

Regulus sucked his bottom lip into his mouth and nodded his head. “I can only come when I’m in your bed.”

Regulus could only finish when he felt close to Sirius, when he was surrounded by his scent and his belongings? What would Regulus’ orgasm be like if he came with Sirius in the bed with him?

“Show me,” Sirius said, tossing the underwear to the side and scooting over to make room for his brother. “I want to see your pretty face when you come on my sheets.”

Regulus’ breath audibly hitched. He tossed his book onto Sirius’ dresser before stepping further into the room, all bashfulness just as forgotten as the page he had been reading.

Regulus grinned, a sultry, sexy thing, before sliding his pajama pants down his legs and kicking them off to the side.

“Make me, Siri.”

[ziazinha]

Close

Wc: 154

Implied wincest (supernatural)

Therapy / Implied/Referenced Child Abuse

@microcest prompt 86: your family is really close

“So, tell me about your family.”

Sam shuddered, shifting uncomfortably on the leather couch. Images of his father and brother spark through his mind, followed by monsters and ghouls and ghosts.

“We… work together,” he says, eyeing the therapist with uncertainty.

She hums. “So you’re really close, hm?”

Sam can’t be sure if it’s the wording, or the way she’s looking at him like she knows, but his mind brings forth other images—Dean, on his knees in front of their father, mouth full of his cock as he cites all the things that his favorite son did wrong on that hunt. Sam, on his belly on a table, dad’s fingers deep in his ass, as he talks about the newest case. Dean, jerking him off under the covers and promising everything’s gonna be alright.

“Sam?” The therapist asks, clearly expecting an answer.

“Huh? Oh, yeah,” he nods, swallowing dryly. “You could say we are.”

[the-invisibility-bloke]

sirius/regulus | 100 words

for the @microcest prompt: blind date

-

“Oh, fuck me.”

“Suppose that’s rather the point,” Sirius says, several moments later, when he finally stops laughing. “So you’re ‘babyboybottom69’, eh?”

“I hate you.” Regulus turns on his heel, but not fast enough to hide the ripe strawberry flush staining his pretty cheeks.

“Sure as hell didn’t hate me on the app.”

“Fuck off.”

“Suit yourself, baby boy. That’s what you get for not showing your face.”

Regulus whirls around and glowers. “You didn’t show yours, either!”

Sirius smirks. “Does that make us soulmates?”

“You wish.”

Sirius swallows.

That’s the problem, isn’t it? The fact that he fucking does.

-

Read on AO3

[kalira]

Fate

A Hellboy fic for @microcest!

Prompt: sacrifice (from April 30th 2025)

Also written for Day 2 of @gywo 7D7S!

T; 500 words Nuada/Nuala

Perhaps this would always have been their end; perhaps it was too late to change their course long ago.

A rare one for me not set pre-canon!

[whumpkink]

what the night swallows

series: bloodbound

written for: @microcest, prompt 001 (03.04.24) - shh... don't let mom hear

rating: explicit | word count: 446

content warning: consensual underage sex, sister x sister incest, explicit sexual content, implied mother x daughter incest.

summary: apparently it was Morgan's fault her sister wanted a quickie where they could be caught by their mother.

also on AO3

Rebekah’s hand was warm — Rebekah’s hand was always warm. It smelled like rosemary and gunpowder and Morgan didn’t mind, because she was busy trying to not come in such an embarrassingly short time. Rebekah knew exactly how to fuck her so Morgan turned into a pathetic moaning mess.

And to think most of the villagers thought Rebekah was still a kid because she was the younger sibling.

What would they say seeing this? Morgan had been easily manhandled to the backalley of Creek’s pub by a malicious and horny Rebekah. She still wasn’t used to the fact that her little sister was now taller and broader than her, not that Rebekah needed the physical advantage to be the one doing all the work.

Morgan wasn’t going to complain.

What she did was take it. Spread her legs as much as her trousers allowed her to, keep whimpering and moaning against Rebekah’s hands as the girl fucked her with three long and dexterous fingers.

“You’re way too noisy,” as if Rebekah didn’t know, at least, five different silencing spells. “Mother is in a meeting with old man Jay, she wants him to gimme a job at the pub. I won’t complain.”

Morgan knew Rebekah didn’t like anything that isn’t practicing magic and spending quality bonding time with her. But she also knows Rebekah is a romantic at heart, therefore wanted to buy gifts for her sister/girlfriend. It was adorable. And not distracting enough.

“Shh,” the hand against her mouth pressed harder and the hairs on the back of Morgan’s neck stood, she felt the lightest spark and saw the brief glimpse of gold on Rebekah’s black eyes. “Don’t let mom hear, you know she’s jealous.”

There was that — their bonding preferences bad to come from somewhere.

Morgan half wanted to be defiant, what was mother going to do? Probably watch it and pretend she was disgusted. However cumming was much more important than defiance that would satisfy Morgan for ten seconds of not less. Rebekah’s palm was pressing against her clit with the exact amount of pressure that made her feel too far and too close from the needed release.

Rebekah had barely touched her and she knew she looked debauched.

She felt dirty and needy, only Rebekah could that — only Rebekah was allowed to.

“Come on, baby girl,” she growled, putting more force behind her thrusts. “ Cum for me, quietly. I promise I’ll reward you.”

It was enough. Rebekah’s tunic was sleeveless and Morgan dragged her nails down her sister’s muscular arms. She hoped the hand on her face was enough to swallow her loudly moaning the name she shouldn’t be moaned as she came.

[honeyedsunrise]

audience of one

Kasumi is singing in the other room.

an asukasu microfic for @microcest prompt no. 106 - getting off to their voice (april 8, 2026). explicit. <100 words.

[anamateurhumanbeing]

Jinxed

Vi/Powder | 400 words

for the @microcest prompt: Curse

Warnings: incest (wow), underaged characters (they're their Act 1 ages, nothing sexual happens though. still iffy), referenced character death (huh)

Powder thinks she's a curse, a jinx. Vi doesn't believe that.

I would apologize, but I've written incest before, and I will write it again.

"Powder, look at me."

Powder did as she was told and looked up at her sister. Powder was expecting a worse expression on Vi's face than the one she got. She was expecting anger. Vi should be angry with her. It was her fault they lost that fight. She should be furious.

"I'm not mad Powder," Vi said, her voice soft. She sat down next to her little sister. "You made a mistake, that's alright. The important thing is you're safe."

Powder buried her head into her knees. "Don't talk to me like that. I know you're disappointed in me. Mylo's right. I'm a curse, a jinx."

Vi wrapped her arm around Powder's shoulder, causing Powder to look up. Vi had a smile on her face that made Powder's heart flutter.

"That isn't true, you know that. You're a brilliant little girl Powder. You may not have my fighting skills, or Claggor's muscles, or whatever Mylo has," Powder interrupted Vi by giggling, causing Vi to smirk before continuing. "But you have brains Powder. Your inventions are brilliant."

She turned and picked up one of Powder's homemade bombs. "What's this one called?"

Powder wiped away her tears and smiled. "Mouser."

"Well I'm sure Mouser will do a lot of damage," Vi said as she set the bomb down. Before Powder could react, Vi leaned in and gave her a peck on the lips. Suddenly Powder felt the blood rush to her cheeks. Vi just chuckled. "Feeling better now Pow?"

Powder looked up at Vi, a genuine smile formine while she nodded. Vi ruffled her hair as she got up. "Come on Powder, let's see what the boys are up to."

Powder sat on the bed momentarily before getting up and following her. Maybe things would be alright.

---

Powder wanted to scream, to shout until the walls crumbled around her. But she just sat in her bed silently. She had screamed at the apartment, she had screamed when they pulled her from the body, and she screamed when Vander came to pick them up. But not that she was in her bed, she was silent.

It wasn't the comfort of home that had silenced her, it was knowledge. Knowledge that Vi was wrong. She was a curse, a jinx. Vi was wrong to think otherwise. If only Powder wasn't stupid enough to believe her. Then maybe Vi would still be alive.