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Chapter 86
by
lew54321
Where do you plan to finish?
All over her face
Having your own sister tell you to cum on her was what finally tipped you over the edge and with little time to think, you quickly decided that you wanted to give her a facial. Without warning her, you pulled your dick out from between her tits and straightened yourself up to aim right at her face.
You had expected her to shy away with your dick so close to her face but the look in her eyes told you that she was more than ready for what you were about to do. You carried on stroking yourself and finally crossed the threshold as you started shooting your cum across her face. The first burst right on the bridge of her nose before you slightly lowered your aim, pointing towards her lips and her cheeks in an attempt to make sure she would have to taste your cum that made its way into her mouth.
You still had plenty left to give though, and after completely drenching her face, you moved further down, first getting a rope of your cum to land all the way along her neck and then letting the rest out onto her breasts before it started to pool into her cleavage. Sarah had closed her eyes as soon as you came on her face but after none of it landed in her eyes, she finally opened them and wiped her nose clean to stop your cum from getting any higher.
Her face still looked to be flushed even under all of the mess you made and although she hadn’t made it to her second orgasm, you could tell she was satisfied with what you had done to her. As a final parting gift, you rubbed your dick against her chest and squeezed out the last few drops from your shaft before finally dismounting for her and lying down at the side of her. You both lay there silently for a few minutes, you catching your breath while Sarah just seemed to be happily basking in the aftermath of what you two had just done.
You didn’t have much room where you were lay but you used that as an excuse to sidle up to your sister to get some extra time for the KDK. You knew that you had definitely gotten Sarah past level 3 but with your phone still in the pocket of your jeans that you had discarded, you’d need to wait until you were probably back in your room before you could check.
“We should totally do that again sometime!” Sarah excitedly announced as she turned her head slightly towards, not looking bothered by the cum around her mouth and even running her tongue over her lips to clean them.
You couldn’t help but stare at her mouth as she did that and couldn’t help but ask her about it.
“Sure we can do it again but I’ve gotta ask, are you really okay with the... you know?” you asked, circling your own face to get your point across.
“What? You cumming on my face?” she asked, getting a nod from you before she continued.
“Of course it's fine, I wouldn’t be much of a ‘fuck doll’ if I hated your cum would I? “ she rhetorically asked, putting up air quotes as she stressed the word ‘fuckdoll’.
“...I guess not” you replied, trying to keep calm about the fact that she was willing to call herself that.
“You don’t think I’m weird for saying that, do you?” Sarah asked, seemingly taking your half-hearted reply as something negative.
“Well, I think that it's fine but if anyone else were to see the two of us sat here like this right after I jerked myself off onto your face, I could see why they would think differently” you joked getting a smile out of her before she replied.
“I’m really glad you did that though and I don’t want us to just go back to how things were before. I’ve gotta admit that we weren’t exactly on friendly terms and I feel like this is the closest we’ve been since we were little” she said, getting a bit sentimental.
“I’m not planning on going back to the way things were so don’t worry. That's probably the last thing I want and If I’m being honest as well then I’m trying to get everyone to be closer together, including Mom and Lucy” you admitted, waiting for her reaction to see how much you should reveal.
“How much closer?” Sarah questioned, with a quizzical look in her eye.
“At least as close as us at the moment, but before you say anything just imagine this. It’s just a regular morning and all four of us are sat at the table but I could just go over to you and start groping you or either of us could just start masturbating and Mom wouldn’t bat an eye” you said, trying to explain a fantasy you’d had for a while.
“Yeah right, like Mom would ever agree to that” Sarah replied dismissively, not even considering the idea.
“But that's what I’m aiming for and sooner than you would think. I wanna get everyone together once Dad leaves and even if I get Mom to agree to anything remotely like that, I’d consider it a win. I know I already owe you a favour but can you at least be on my side if I do put something forward?” you pleaded, hoping that Sarah would be the first to go along with your family harem plan.
“I don’t know… If Mom and Lucy are firmly against it then I don’t want them to think differently from me…” she confessed, looking a bit down.
“What about if I could get Lucy to agree then? That way it will be three against one instead of two vs two.” you asked, trying to bargain with her.
“There's no way Lucy will agree” she replied, shaking her head.
“But let's say she did, would you help then?” you said hypothetically.
“..well sure, I don’t see why not” she relented.
“Good!” you exclaimed, jumping up from where you were sat before scooping up your clothes from the floor. You still had to figure out a way to get Lucy on board but with at least Sarah willing to be on your side, this would be a lot easier. Sarah still didn’t seem convinced but you weren’t about to give her enough time to go back on what she said.
“No take backs” you said, grinning as you left the room. Although you had picked up your clothes, you hadn’t managed to put them on before you left and putting them on in the middle of the hallway would just leave you more exposed. The house was completely dark apart from the light leaving Sarah’s room so you just rushed towards your room as quietly as possible and managed to safely get into your room with no issues or interruptions.
A wave of fatigue hit you once you were finally on your own and with everything that had happened today, from the messing around you did with Sarah and even the unexpected shopping with Rebecca, you felt like you deserved a long rest. As much as you wanted to let your head hit your pillow, you still felt a little excitement at checking everyone’s KDK profiles, especially Sarah’s given how close she was to levelling up previously. You fished your phone out of your pocket and were immediately greeted by a series of notifications.
Multiple changes detected. Click here to view details in the KDK app.
Achievement Unlocked! - First titfuck! - 2 points received.
View Achievements tab for more details.
Sarah Cooper level up! 2 points received. 5XP
Status updated. Effects available after the subject has rested.
Name: Sarah Cooper
Role: Subject, Twin Sister
Age: 18
Kink: Free use(level 3 - 2579/20000 seconds)
Levels:
Level 1 - Unlocked - tap for more details.
Level 2 - Unlocked - tap for more details.
Level 3 - Unlocked - tap for more details. Cannot be activated until subject has rested.
Level 4 - ???
Level 5 - ???
Level 3 details
Passive -
Will allow the User to touch/use the subject's mouth/throat in any way they see fit. The more the User uses them, the more aroused/attracted they will be to the user and the acts they are doing.
Active -
Max sensitivity
Condition(s): Be within 20 metres of the User.
Effect(s): When activated, all of the subject’s erogenous zones will be linked to their pussy, allowing the subject to experience full body pleasure. This also increases their overall sensitivity to allow more intense stimulation. Lasts for 2 hours or until deactivated.
Cooldown: 6 hours
Achievement: First titfuck!
2XP, 2 points - Have someone pleasure you with their breast for the first time
Special: Up a Cup(subject upgrade)
Up a Cup (subject upgrade):
Increases a subject’s cup size by one letter(A to B etc). Size changes gradually throughout the day and is completed after 24 hours.
Next up were the upgrades you had forgotten about from earlier in the day when you were with Emma.
Keep it up! V3 (user upgrade):
Permanently decreases the amount of sleep needed for User to feel refreshed by 1 hour.
Tap to confirm use (Warning! may cause mild discomfort during the application process).
No time to rest(Subject one-time effect):
Allows the rest condition when a subject levels up to be ignored one time.
Tap to confirm use (Warning! may cause mild discomfort during the application process due to sudden Subject change).
And finally, you thought it best to give a quick run down of where everyone was at when it came to their stats(including yourself).
Name: Max Cooper
Role: User
Age: 18
Level: 4 - 196/250xp
Points total: 100
Name: Sarah Cooper
Role: Subject, Twin Sister
Age: 18
Kink: Free use (level 3 - 2579/20000 seconds)
Name: Emma Turner
Role: Subject, Best-friend, Girlfriend, Neighbour
Age: 18
Kink: Cuckquean (level 3 - 1127/10000 seconds)
Name: Mary Cooper
Role: Subject, Mother
Age: 45
Kink: Submission (level 2 - 1545/3000 seconds)
Name: Rebecca Ryan
Role: Subject, Teacher
Age: 25
Kink: BDSM (level 2 - 572/5000 seconds)
Name: Grace Turner
Role: Subject, Neighbour
Age: 39
Kink: Exhibitionist (level 1 - 145/400 seconds)
Name: Lucy Cooper
Role: Subject, Older Sister
Age: 19
Kink: Cum Play(level 1 - 73/300 seconds)
Author’s Note: Tried to give a brief overview of the current state of all the subjects and although I’ve tried to keep track of specials and shop items, I may have missed something along the way. If you think that's the case feel free to let me know and I’ll do my best to add it back in.
There's unlikely to be a chapter next Tuesday due to some medical reasons but if you wish to read ahead, the extra chapter is available on Patreon(link in profile)
Happy reading :)
The morning after
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Kink Development Kit
An unknown program leads to kinky encounters
A fetish app based story inspired by others of the same genre. Follow the protagonist's story after finding and using the app for their own selfish desires.
Updated on Mar 29, 2026
by lew54321
Created on Feb 28, 2021
by lew54321
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