Fonsest/Sanscest
9 stories
Lust x Horror {Sanscest} (Plus Fontcest, Sanscest, & Pappycest Oneshots) by Mavi_Sumukler
Mavi_Sumukler
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HELLO FELLOW SINNERS~ this is a smutty/fluffy fanfiction based of plots I have either made or was randomly told but anyways be sure to request thats what keeps this book going and also keep in mind there will be slow updates sorry 😅 Enjoy~ ~Mavi Sümüklər
Fontcest Oneshots! (Under editing, Updates are still active though) by Chara_Sinlust
Chara_Sinlust
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Different AU's and different stories! <3 -Have a idea? tell me in the comments -thanks for reading <3 -no rude comments please ;3;
Don't Go [Underfell] [Complete] by VoidVicy
VoidVicy
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A story of constant restarts of a morning. Non stop death of a brother. Non stop grief of a brother. It is a punishment, a lesson, to be learned. That takin lives of innocence; even though it is for no reason or good. Is crushing, it tears apart family for nothing but loneliness. Papyrus. What have you caused?
Trust me.. {UnderSwap} Fontcest by GLitCH_the_ViRuS
GLitCH_the_ViRuS
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Sans has been training to be in the Royal Guard for years, spending hours upon hours of training and playing out fake battle scenarios in an effort to be chosen by the Queen. Recently, Alphys has pushed some of the responsibility of teaching the young pupil onto his older brother, Papyrus, to strengthen their bond as family. He's much too lazy to fight, but he may have something else in mind.. UnderSwap Fontcest. Deal with it.
Falling in pun with you (Completed fontcest Story)  by Intellectualpan
Intellectualpan
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A skeleton named Sans falls in love with the only thing that makes him happy, that made him feel complete... his brother Papyrus. But when sans suspects papyrus of falling for undergrounds hottest star Mettaton he fears he'll never get his bro to love him. What will sans do? Fight for his brother or let him be with someone else? { Please note: If you haven't played Undertale or don't like the ship foncest don't read, but if you do ENJOY :) }
I Wish To Stay By You {FontCest}[[Unfinished]] by Soapsss
Soapsss
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Just read, I'm sure you'll enjoy So mostly it's from a roleplay I've been having. I just wanted to randomly post it and see how people like it? It's still a on going roleplay and if you guys like it then let me know and I'll update! {{ALSO, some punctuation might be a little screwy because this is a copy and paste.}}
Sanscest/Fontcest Fluff and/or Smut One/Multi-Shots [Requests On Hold] by TheTexanAuthor
TheTexanAuthor
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(Cover by Jam_Painter) (New updated cover!) I do Sanscest. Simple as that. Maybe a little Fontcest. Maybe. I do take requests. But I also do my own ideas. I am Undertale Trash. YAY. Fav ships are CherryBerry, Cream, Crossmare, ErrInk/PaperJam, SciFell, AfterDeath, Poth, and several others. Not in that order...
SOUL-BOUND by MariaLNBorges
MariaLNBorges
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An undertale multiverse ship book. This book contains lemons. (However they are HEAVILY story based so if pure x without story is what you're looking for, you came to the wrong place) Also If lemon is not what you are looking for, or upsets you in any way, then leave it's easy. I make many more books than this, I'm sure you can find something else that suites your fancy. However, if you choose to continue, than give the stories a full chance. You might actually like the plot more than the lemon scene itself. All stories start with a lemon scene However, don't let that discourage you from reading farther. It's just how I choose to "begin" the story instead of having it in the middle like most writers.
fontcest  by avaalltimelow
avaalltimelow
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sans and papy have a little fun