Human Corruption

>human wife has a very serious corruption fetish
>she saw one of her friends monsterize and got off to her description of how it felt
>since then she's been all over the idea
>insists on heavy roleplay, has all sorts of elaborate costumes
>sometimes introduces herself as a succubus when meeting new people if she's feeling kinky
>tries to go for really long sessions in bed, but can't quite manage it
>likes to beg you for your 'mana' when she's talking dirty
>writes sexually-charged fanfiction of turning into a monster and raping you
>can't for the life of her figure out how it actually works
>doesn't know any monsters who could help, friend moved away with her husband
>monsters never pass through town, she can't seem to find any
>puts up ads in the papers looking for prisoner fruits or other help with corrupting, gets nothing
>sometimes goes on ridiculous sex benders with you hoping the lust alone will do it
>pouts for days when she wakes up human after

I imagine it'd be hilarious watching her try multiple ways to corrupt herself.

>buys up all the black market manticore spines she can
>stabs herself over and over with them
>just results in a 3 day long sex bender and no transformation

>buys up all the holstaur milk she can
>keeps chugging it but nothing happens
>turns out the holstaur milk is being mixed with cow's milk by the vendor
>diluted enough to prevent transformation

>writes a letter to the Demon Lord begging to be personally corrupted
>USPS drops the letter somewhere at the post office and loses it
>never receives a response

>finally gives up on becoming a monster girl
>next day, a Lich comes to town who offers to zombify, ghoulify or skelify her
>as long as she doesn't mind temporarily being kill

>she gets a really lewd heart tattoo on her lower belly
>gets some super-low riding leather panties so she can show it off, refuses to cover up when you're at home alone together
>She even got some real goat horns and made a fake succubus tail to go with the outfit
>starts rubbing it and poking at it during sex hoping it'll activate
>talks like it's setting her body on fire and making her insatiable
>still just a normal tattoo, it's all just roleplay
>she is a little hornier from the placebo effect though, so hey

I have to Imagine she has to have gotten pregnant once. Unless of course another she wants to monsterize is because she is infertile.

>she wants to monsterize because she is infertile

Oh no, it's sad now.

>exhausts herself grinding against your cock for hours, just hoping something happens this time
>you've started going soft, too tired to go on
>she says the safe word and pulls in close to plead with you
>"C'mon... please just a bit more, honey...I just want... a little girl... c'mon... we can do it..."
>she's panting and sweating from the exhaustion, but still keeps going
>the doctor told her that her chances aren't gone, but they're slim and waning
>she doesn't know how much time she has to have a baby, so she's in a rush
>the tail fell off her costume and the horns are sitting crooked on her head, but she's still trying to act like she's a sexy succubus
>she rubs again at her tattoo, where the skin is already red
>"Give me... more mana... you... you weak... little human man... unh..."
>eventually she slumps over you, her makeup running
>you help her sleepily clean up and take off her costume and makeup
>she goes to sleep hugging your shoulder, trying not to cry

>the shop actually engraves real pleasure runes
>they just ran out of engraving ink
>the artist tried to talk to her and come back tomorrow
>she won't back down

>there's a few weeks where she just isn't into it anymore, she's too sore and tired to really commit to the act
>you give her some space and time to rest, figure it's unhealthy to force it
>go back to the doctor, she's in there a long time
>when she comes back out her eyes are red and she looks like she really wants to cry, but doesn't say anything
>you look at the doctor and you both just nod, you know what it means
>you have a long talk when you get home, and you decide to sleep on the couch for the night
>in the morning she's still not quite herself, but she's put the costume back on and does her normal lovey-dovey lewd morning routine, shaking her ass and talking dirty as she makes coffee
>she props herself up on the kitchen counter and looks you right in the eyes
>"It... it's okay, dear. We still have lots of time for each other, right?" she asks, smiling but her voice is shaking
>you hug her and tell her that's right, you still have each other
>"We're a fine family, just the two of us." she says, before she squeezes you a little harder. "I love you."
>you kiss long and hard, like you've never kissed before, deciding that if you can't be the best parents ever, you'll be the best couple ever
>you're interrupted when you hear what sounds like two people arguing outside, and open the door
>on the front step stand a houri and a succubus, each one carrying a scroll
>they both unruffle their clothes and try to look professional, the houri stepping forward
>"geez, what a backwater town. you know how hard it was to find this place, like-" the succubus gets cut off
>"We've recieved reports" the houri starts, "that your romance has met Eros' high loving standa-"
>the succubus shoves her back out of the way, yawning
>"My jurisdiction, honey. just look at her." she gestures to your wife, and the houri blushes. "Clearly she wants to play for the winning team."
>they both open their contracts, and present them to you
>"So, like, sign this and we'll make you a succubus. All official and shit." says the succubus, puffing out her huge, wobbling chest. "...unless you wanna just cosplay until you get all wrinkly and flabby."
>"S-sign this and you'll become a houri!" stammers the houri, unconsciously shaking her hips. "Eros loves you both and thinks you're a wonderful couple!! We can't wait to meet your baby!" she says as she starts tearing up
Which contract does your wife sign?
https://strawpoll.com/hyhkx8fr

>both contracts begin shining before wife can even touch them
>the succubus and houri both jump back, startled
>"The hell?" grunts the succubus, hands on her hips
>"What the actual fuck?" shouts the houri, pointing
>Wife turns to you, looking scared
>"W-wait, no, what's happe-"
>she tries to grab onto you, but as soon as her hand touches you, there's a flash
>your eyes adjust, and when the light dims down, your wife is gone
>shimmering lights are raining from the sky, and the houri and succubus are both dumbstruck
>you call your wife's name, not sure what else to do
>there are a few minutes of terrifying silence
>suddenly the lights converge in front of you, forming a glowing sphere
>a crack forms, and a hand breaks through
>you start frantically tearing away at the shell of whatever it is, and calling her name again
>each time you say her name a new crack forms, until finally it all falls away
>your wife stands there, naked, but different from before
>she's got long, white horns, poking out from incredibly long black hair with white tips
>a pair of white feathered wings stand at her back, with a long spade tail swishing around her waist
>there are beautiful black runes of all kinds all over her body, though the one she got at the local tattoo parlour is still there
>her human body seems exactly the same at first, nothing was added or subtracted
>however there's a sort of rosy pink glow to her skin, and a feeling of warmth coming from her
>her form is voluptuous, but graceful, all following one long, curving line
>finally she opens her eyes, and they shine smoldering silver as she looks at you, smiling
>she steps forward and pulls you in for a kiss, her lips so soft it's like your first kiss all over again
>she presses herself up against you, her wings and tail wrapping around as she kisses you again, harder this time
>and again
>and again
>finally she lets you take a breath, and presses her forehead to yours
>"Thank you, my love..."
>"...for being exactly who I needed you to be."

>you spend weeks cloistered away in your home, making slow, gentle love that you thought you might have forgotten
>she wrings you dry, her hips now stronger than your whole body, then squeezes out more mana you didn't even know you had, crooning your name and holding you close for every minute of it
>months pass, and finally, after so long...

>she's showing


Happy end!
Good end!
Best end!