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Mx Female Dark cheating and NTR stories with bad endings, with or without a healthy dose of romance

fandani

Meteorite
Joined
Jan 18, 2025
Hello! I'm a little new here.

I want to roleplay dark stories featuring cheating/NTR. I like the spice, the depravity, and the complex challenges and emotions. I also enjoy playing with intense carnal desires that pierce through love and guilt - good girls doing bad things and all that. Most importantly, I LOVE it when things end badly, where the boyfriend suffers a humiliating defeat or forces himself to accept it; this is his life now.

I am happy to play both the "antagonist" and boyfriend, or just the boyfriend. The oblivious (or not) boyfriend should still have a fairly prominent role to play in the story either way.

I'm open to low ratio or high ratio ERP. I'm also open to widely varying levels of romance, from pure carnal desire that's purely physical based, to stories where that desire leads your character to falling in love with someone else. Even if there is romance though, I want it to get dark, she's going to end up hurting her partner eventually.

I don't wish to RP fandom/cannon characters. I'm open to real world or fantasy settings, with a preference towards real world for the sake of relatability.

Story ideas
I haven't really written these as a formal synopsis so please forgive some of my idea sprawling!

A lot of these are smut heavy because they're easy to come up with, but we could work alterations out and fit these smutty situations into a bigger story. I also suggest potential plot directions with varying levels of depth - they are suggestions and we don't have to follow them.

If you don't like anything in the plot ideas further below please note I am into almost all the standard cheating/ntr tropes and I am willing to accommodate to this list, plus any more I may have forgotten.
  • Girlfriend x boyfriend's bully
  • Girlfriend x boyfriend's wealthy nepo boss
  • Girlfriend x ex boyfriend
  • Girlfriend x boyfriend's roommate
  • Girlfriend x neighbour
  • Couple tries cuckolding
  • Couple tries swinging
  • Friend ruins relationship by setting up girlfriend to cheat with her FWB
  • 'Meant to be' but now unrequited love gets stolen away
  • MC finds out the woman he's into is a size queen and isn't enough for her
Real-world
Heavily inspired by an asmr RP audio on YouTube, but this would feature a bad ending.

A barista forces someone she's into to ask her out who she shares a mutual thing for by teasing him and saying if he doesn't, she'll give her number to a customer who asked for it earlier by writing her number on his cup. The person she's into asks her out, but she mistakenly misplaces the cup and gives it to the other customer. She doesn't respond this other customer's messages, but when he comes back to the cafe and teases her, she begins to entertain his texts - partly because she doesn't want to be teased again.

A balancing act begins as she proves to be very compatible with the other guy and feels guilty for it.
A young couple decide to try cuckolding after much deliberation. However, the girlfriend does the unthinkable of secretly picking someone she used to have feelings for, naively believing that was all in the past.

I would love for the couple to either live in a room or a studio apartment. I think the confinement of the space could really be fun since the boyfriend has nowhere else to go to.

Any cuckold stories I wish to do should start having agreed upon boundaries broken. In this example, she would start bringing him around after work without asking, and eventually move on to proper cheating.
A potentially short but fun story of two colleagues going on a business trip who are very close but not dating. It would be strongly implied they are both very interested in one another.

Having just spent two nights on their trip, they find out they can't return tonight (Friday) because of bad weather which will hang around for much of the weekend. Now leaving on Monday, they'll get to enjoy a fancy hotel with a hot spring together. Your character plans to use it as an opportunity to make a move, so after they finish working she tells him to return to the hotel while she quickly goes and buys something. Later that night, she invites him to join her in the hot spring and teases him by showing off a very special bikini she had just bought. Before she heads off, she says he better come or maybe she'll meet some other hunky guy in there and spend the rest of the weekend with whoever that could be instead.

Something happens, whether it's sudden sickness, he chickens out, or maybe a work call comes in, so when he finally arrives over an hour later... she's gone. She's hurt from him not joining her and wonders if she misunderstood him. So when someone actually does join her in there, a good looking and confident guy, her tease she made earlier ends up becoming an unintended reality.
A tiny smut heavy story featuring an ex who leads a gang/criminal organisation. Dives deep into some of the fantastical elements of sex in the way hentai and NTR can often depict it, where pleasure is paramount.

The girlfriend suddenly goes missing and the boyfriend has no idea where she is. She has been abducted by an ex who's now running a criminal organisation and wants her back.

Through investigating, her boyfriend discovers where she is but he's bound, gagged, and hooded by surprise before he can find a way inside. He's carried into a room where his girlfriend and her ex are, and is unmasked, but still bound and gagged. She's horrified her boyfriend has been caught up in this and tells her ex to let him go. This is where the extra silly bit starts - the ex will set some terms for her to prove she's really over him, by setting a 'try not to cum' challenge where if she can hold in in, they both can go. She'll be able to make it, right?
A woman has been in an awful car accident and the head impact wiped her memory of the last year and a half. She met her boyfriend within that time and unfortunately for him, he's back at square one and needs to prove himself again. A new friend she made in hospital makes winning her back a challenge and it doesn't go well as her boyfriend's panic and desperation when he realises how close she's getting with the other guy seems to push her away.

She's filled with guilt and tries to make it work, which only makes things worse for her boyfriend who bares witness to far too much.

I think it might need to get fairly depraved, such as her becoming completely sex driven. I remember an old cheating story I read where the other guy sort of reshaped her personality a bit, so maybe in this one she would end up being not the person he fell in love with.
A woman in a relationship wants to start an OnlyFans page because she feels confident she has what it takes to bring in some money. Her boyfriend doesn't doubt it because she's beautiful and has a great body, but still feels uneasy about it. He reluctantly allows it to go ahead since their financial situation is difficult. Slowly along the way her amassing followers ask her to do more and more. What was supposed to be an account featuring bikini pics has ended up featuring full body nudity and masturbation. Her boyfriend agrees again and again to her new suggestions and whims of her followers, but needs some convincing each time a bigger step is made.

Eventually she starts getting DMs from people who want to colab with her. A well known male model who's found success from his big cock reaches out to her, offering a chance to make content together and really boost her profile. What was supposed to be a recording session ends up far more carnal and at some point the camera stops rolling...

Alternative idea: As it will turn out, he's her boyfriend's former bully. Because his account and videos obscure his face, and his girlfriend never met or knew the bully, she finds out far too late.
This is a story idea where you would write for the best friend of a woman in a relationship and delves deeply into manipulation to cause the girlfriend to betray her boyfriend, while leading the boyfriend down a depraved route of acceptance.

A woman comes back from studying interstate to discover her old bestie is dating someone. While the woman who studied abroad went on a 3-year sex crazed bender of self-discovery, her best friend enjoyed a sweet vanilla romance. There's probably something a little wrong with the friend who has just returned, and she's definitely not a good influence to have around. She comes to the conclusion that her best friend deserves better and needs to have her eyes opened, and no one is going to get in her way.

The story would involve a lot of manipulation, where she would manipulate her bestie to cheat, maybe through some unethical methods, and also maliciously manipulates the boyfriend to somewhat accepting that his girlfriend has certain "needs" that need to be "filled". The girlfriend would think her boyfriend has no idea the entire time, but the bestie would be keeping him in the loop every step of the way.
The boyfriend's childhood friend, a woman his age, was once into him. Somewhere along the line, he got a girlfriend that wasn't her. Their friendship continued through his relationship with his new girlfriend, but their dynamic changes a bit when the boyfriend catches his friend with a guy who's a fair bit bigger than him mid blowjob. He catches her eye from the doorway, but rather than stop, she keeps going before turning her attention back to the person she's with.

She later confronts him about it, and probes out of him some sort of cuck fetish, which she's partially horrified by and equally amused by. She teases him about his girlfriend, and then secretly goes to work in an attempt to make it a reality for him because she's completely sadistic. She uses the guy she was caught with and sets them up to start getting close. The friend would tease the boyfriend every step along the way, never admitting to how she was behind his girlfriend becoming friends with that guy.
It turns out the other girlfriend/wife was maliciously trying to make your character her third in a polyamorous relationship… But that's only going to succeed if she manages to turn your character against her boyfriend. The sex your character is having with this other guy is incredible, as they work to plant seeds of jealousy in her mind that her boyfriend is enjoying himself a little too much with the other woman (which is totally hypocritical of her to be offended by, but she fails to see it).
A hot goth girl discovers the guy she's mutually into doesn't quite cut it compared to her FWB. Early in the story she would discover his inadequacy and offer him a bit of a cruel and simultaneously companionate hand job to help him get over her. The hand job would feature plenty of teasing, with her whispering in his ear and telling him he needs to promise to get over her once this is done, comments on his size and what she prefers, and her ultimately coming to the conclusion that keeping him around might be a little fun.

Features plenty of planned surprise exhibitionism by her, "look what I played with yesterday" photos shared, and more.

Potential scene: She asks if he'd like to hide under her bed when she brings her FWB over so he can hear how it should be done.

The "goth girl" theme not necessary if that doesn't suit your OC.
There's a whole bunch of potential bully plots here:
  • A girlfriend takes matters into her own hands but gets caught up in a mess and blackmailed.
  • The bully ends up finding accommodation at the girlfriends share house she's living in.
  • A story where the bully has already stolen his girlfriend before, he gets a new girlfriend who is kind, sweet and supports him through his trauma, only for it to happen again with the new girl
  • A debt is owed that cannot be repaid. The debt is with some people who turn out to be dangerous, and the bully offers to pay half of it if he gets to fuck his girlfriend, and all of it if she agrees to live with him for 3 months. They start with just the first offer, but when things get dangerous again, they feel forced to accept the second
  • A lost bet that's gone way too far, but the boyfriend never considered his girlfriend would actually fulfil the conditions of her boyfriend's loss. Maybe she was actually a little turned on by the bullying
  • Almost every other plot i've recommended could feature a bully antagonist.
Features a couple who don't live together in a setting where the cheating involves a roommate who's regularly bringing around someone new to fuck. The boyfriend doesn't pick up that the moans coming from the roommate's bedroom as of late actually belong to his girlfriend who's not really going home after they hang out together.
Three friends, two guys and a girl, go on a holiday trip together to a hot spring. There are no established relationships but it's heavily implied two of them feel strongly for one another. Drunken games of Truth or Dare lead to her having sex with the other guy and rationalised it by her being single - despite her potential lover being right there. A very compatible sexual relationship begins to sprout. The story would be about the build up to the trip and the attraction between the potential couple, and then the emotional battle after of her trying to deal with her feelings for the other guy while not exactly being unhappy about the great sex she's now having.
A guy's girlfriend and another man end up getting stuck in quarantine together for two weeks. There's a couple of options as to who she's actually stuck with, it could be a colleague when on a work trip abroad, it could be the friend she told you not to worry about, it could be some wealthy young guy she happened to catch a room with, maybe even a bully! Open to ideas!

Fantasy
A young witch of the forest has been working as a local magical investigator for hire in order to feed her obsession with the occult. Her latest contract is from a rather troublesome man who has tasked her to discover why a number of people have gone missing when visiting an ancient crypt at the edge of a nearby lake.

Growing up, she would adventure out to the nearby farm at the forest's edge and play in secret with the boy her age in who lived there. Both now adults, the young man has become a farmhand who she likes to tease and kiss. She is constantly looking for any excuse to spend more time with him and chooses to drag him along for this contract.

They enter the crypt and discover a stone alter covered in demonic markings. Out the centre, a burgundy sludge oozes out slowly, looking not too different from blood leaking out from pierced flesh. Pulled into a trance from her curiosity, she reaches out to brush the soft tips of her fingers against the stone and jolts as a searing pain swells on the skin of her lower abdomen.

Branded with the seal of a succubus, they both must now find a way to break it or she will eventually transform and lose herself completely.

The seal works by initiating a constant sense of arousal which if left unsated will eventually lead to an irreversible transformation into a succubus. If the arousal is regularly sated, the seal will fade in time, but there's also a bit of a catch, the more the seal fades the stronger the side effects get, as if it's a living organism trying to preserve it's life causing more regular arousal flareups in order to catch her out and leave it unsated. Alternatively, several hard to obtain reagents can be used to break the seal, but the likelihood of getting them in the remote region they live in before it would be too late is slim-to-none.

They know how to fix it, but will her boyfriend be enough? Or will the man who issued the contract be required to help?
Three survivors in a zombie apocalypse struggle to deal with their relation dynamics - a couple and a stubborn dick, who's far too useful to leave behind. They can't stand his constant need to be in charge, but his knowledge of survival is the key that's kept them alive.

The inner-city proves to be an unexpected haven as the zombies had mostly dispersed into the suburbs, but with those areas teeming the inner-city has become their prison.

Trapped in the inner city and left behind, it proves to be an unexpected haven as the zombies had mostly dispersed into the suburbs.

Potential plot idea: There's a lot of options when it comes to this, but here's one suggestion. The trio take it in turns to scavenge for a few hours each day, and on the boyfriend's next turn, he gets stuck in a very dicey situation with a small zombie horde and has to hide. What was supposed to be a few hours, suddenly turns into 8 days. The girlfriend is absolutely distraught, fearing the worst, but clings on to hope as the other guy helps her search for him. Filled with feelings of vulnerability, being alone with this stranger, and facing an apocalyptic world without her lover, on the seventh night she doesn't stop his advances and sleeps with him in order to seek some semblance of comfort. Several hours later, her boyfriend returns, glad to be alive. She is overwhelmed by her return, is eternally grateful, but he doesn't know that's not the only reason she's in tears. The new sexual tension fails to go away, and the stubborn dick pushes all of her buttons until she cracks.

What I like about this one is that the trio truly are trapped in the inner-city with the zombies are concentrated in the suburban areas. There's no reasonably survivable way for the boyfriend to leave on his own. If he discovers what's up, he'll have to accept it or likely die trying to survive alone and escape. This could get extremely depraved. This one could also have heavy or light dom elements from the other guy as the story develops. Either way, it'd likely be implied the third has got a more domineering presence, whether it be due to a muscular build, height, or both.

If we went with this plot idea, it'd be a good one to explore the slow build up of her agreeing to more and more after her boyfriend returned.
The town is being attacked by a demonic invasion by a bastard of a hero. This one would involve two close friends that just haven't made the move to actually be lovers despite the attraction and affection being there. The hero finds her to be his type and wants her for himself. She ends up slowly becoming corrupted by the hero and becoming his plaything. The hero is manipulative and pretends the demon situation is out of control to stay in the town longer despite having actually already dealt with it.
A man lost his chance to be with the girl of his dreams back in university, losing out to someone else. In retaliation, he decided to dedicate his life to pushing the boundaries and abandoning ethics in science. Several years later he illegally creates a clone of her and selects memories of her lover to be removed. Somehow, and this is where I'm struggling, the clone and the scientist enter the normal every-day life of the couple (and it wouldn't be revealed that the clone was cognitively altered like that). Maybe after the initial horror and shock, the girlfriend wants to treat her like a sister in order to protect her? I feel like this one might be a bit difficult to write because there'd be a psychological thriller element of who's who, and whether the real one is sleeping with the scientist or the clone.

Potential plot idea: The clone becomes more open about her love for the scientist eventually and the boyfriend ends up catching them together a couple of times. At some point, it wouldn't be the clone anymore and he wouldn't realise it. A very twisted ending could involve him being invited in to watch, only for his "girlfriend" who's actually the clone to walk in, and in his shock of being caught red handed watching another couple having sex, the clone reveals she is in fact the clone.

Alternative real-world version of this could involve twins.

Fetishes and themes I enjoy:
Getting caught in the act/exhibitionism – Getting caught by her partner while she's right in the middle of it, intentionally or not. Especially like it when it's reoccurring, though requires a story where her partner can't/won't leave her to work.

Bully – I enjoy power dynamic between a boyfriend and his bully. Suits boyfriends who are a bit more submissive or struggle to stand up for themselves. Ties in well with exhibitionism since what's the boyfriend going to do about it?

Inferiority complex – The boyfriend feels jealous and/or inferior towards the rival (and he can't really be blamed for it!).

Cheating on a very special occasion - Valentine's Day? Her partner's birthday? Bonus points if she misses really interacting with her boyfriend at all on those days, outside of text messages, because she's completely distracted. Also a pretty good opportunity to time a 'no turning back now' event (like throwing her heart in, or finally agreeing to no protection). Definitely a fave.

Slow build ups – This doesn't work for every story, but I do enjoy it when inhibitions are slowly broken down. Eg, agreeing to only give a handjob, and then slowly taking it every step of the way through to unprotected sex through each encounter.

Jealousy - Jealousy that can lead to poor judgement and poor behaviour, potentially leading to unwanted fantasies becoming reality via toxic revenge and a weaponized, "fuck it, if he doesn't trust me maybe I'll actually do it then" attitude.

Misunderstandings - A tragically poor misunderstanding that leads to cheating (eg the story "A business trip misunderstanding"). Usually would work best in stories where they aren't in a relationship but all the stars are closely aligned for them to be.

Teasing - Whether it's from swinging experiences or stories that continue after she's been caught, a character that enjoys teasing her partner about what she's getting up to.

Cheating to cuckolding - Probably one of my preferred outcomes to cheating most of the time.

BSS - A NTR subgenre better described as 'but I loved her first' where a potential lover is stolen away. It's pretty dark due to the general helplessness of the MC who has no right to impose on a connection he has no authority over, thanks to a relationship never establishing. Should involve strong emotions of jealousy from the MC, and deep guilt from YC who also wanted to be with MC.

Free use cucking - Bit of an alternative spin where the bull keeps showing up unannounced and as per their deal, and her fetish, she has to have sex whenever he wants it. The situation gets completely out of hand for the boyfriend who loses complete control over ending it.

I'll probably make another thread at some point, but i'll do vanilla for a sweet & caring girlfriend role, especially mommy-girlfriend (not an actual parent). Dommy-mommy too. You're tooootally not going to be my therapy. Mutual healing maybe? Also strong dom (bully or even orc) futa x male.

Fetishes and themes I don't like:
Scat, pee, gore, old man, father/step-dad, ugly, extreme end of BDSM. Generally things that are extreme, ask if you are unsure.

I'm not really interested in noncon. Dubcon works as long as she's secretly enjoying herself and it turns into clearly becoming con eventually.

Typically not interested in writing for a male over 40 and greatly prefer characters 18-35. Biggest age gap I'd be ok with is 18-35. Your character can be older.

Not too sure about gangbangs, I know they can be popular for the genre, but I usually prefer a more personal connection to who she's cheating with.

About me:
For anonymity- I'm male and English is my first language. I operate from GMT. I also work full time.

I have a fair amount of text-based RP experience, but not so much with strangers, so that part is a bit new to me.

I should be able to send something back at least once a day, or every other day, with some exceptions due to work or regular life plans. I'll let you know if I need a pause for sickness/holiday. If the timing is right and I'm free, multiple a day is possible.

How much we OOC is up to you, I enjoy the opportunity to get to speak to someone I share these interests with, but I understand some people aren't looking for that at all and we can keep it minimal to planning and figuring out mutual kinks for a better story etc. I'll probably just match your level of OOC roughly, but know i'm typically down to chat.

Primarily interested in writing third-person. Can't really think of a time i've written in first-person, but fairly curious to explore if someone is interested. I'd be more interested in writing from the boyfriends perspective if we tried first-person, I think.

Hoping to find someone who's down for something long-term, and go far beyond what I have listed here since like-minded partners are hard to find due to what I think is a big M-F imbalance, but I'm fine with one-offs too.

I expect to write on average 1-2 paragraphs, but could go to several depending on the situation (some recently have been around 500 words). I would expect at least 1 paragraph in return.

Thanks for reading! If you reach out, please give me plenty of time to respond if the timing is poor! Work-life-sleep, and all that.
 
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