SinnySkelle
@sinnyskelle.bsky.social
33 | She/They | An Undertail, fontcest, sanscest, UTMV fanfic writer & artist. 🔞 NSFW Content 🔞
Reposted by SinnySkelle
Comic Fontcest Part 1.5/2 color ver.🌈(⚠️Somno/Dub-con⚠️) #fontcest #papysans #sanspapy #sansxpapyrus #papyrusxsans #Undertail
November 28, 2025 at 9:59 PM
Comic Fontcest Part 1.5/2 color ver.🌈(⚠️Somno/Dub-con⚠️) #fontcest #papysans #sanspapy #sansxpapyrus #papyrusxsans #Undertail
Reposted by SinnySkelle
Day 3 of kinktober "Voyeurism" Sorry for the delay, it will happen again probably #sanscest #afterdeath #afterdeathcest #deathcest #reaperxgeno #reaperxgoth #genoxgoth
October 11, 2025 at 6:56 AM
Day 3 of kinktober "Voyeurism" Sorry for the delay, it will happen again probably #sanscest #afterdeath #afterdeathcest #deathcest #reaperxgeno #reaperxgoth #genoxgoth
Reposted by SinnySkelle
Colored ver🌈 Comic Day 4/5/6 Part 1/2 (⚠️Somno/Dubcon/Wet dream⚠️) #fontcest #papysans #sanspapy #sansxpapyrus #papyrusxsans #undertail
October 29, 2025 at 4:43 AM
Colored ver🌈 Comic Day 4/5/6 Part 1/2 (⚠️Somno/Dubcon/Wet dream⚠️) #fontcest #papysans #sanspapy #sansxpapyrus #papyrusxsans #undertail
Reposted by SinnySkelle
October 19, 2025 at 7:49 PM
Reposted by SinnySkelle
archiveofourown.org/works/716657...
sorry guys i blacked out and wrote about vamp!cross being absolutely wet and pathetic and dust making fun of him a little bit today sorgy (not sorgy at all)
#crossdust
sorry guys i blacked out and wrote about vamp!cross being absolutely wet and pathetic and dust making fun of him a little bit today sorgy (not sorgy at all)
#crossdust
October 8, 2025 at 5:05 PM
archiveofourown.org/works/716657...
sorry guys i blacked out and wrote about vamp!cross being absolutely wet and pathetic and dust making fun of him a little bit today sorgy (not sorgy at all)
#crossdust
sorry guys i blacked out and wrote about vamp!cross being absolutely wet and pathetic and dust making fun of him a little bit today sorgy (not sorgy at all)
#crossdust
Reposted by SinnySkelle
archiveofourown.org/works/716657...
todays bullshit of the day is #crossdust doing ectoswap, which is what i call it when you put your ecto onto ur partner and vice versa
todays bullshit of the day is #crossdust doing ectoswap, which is what i call it when you put your ecto onto ur partner and vice versa
October 5, 2025 at 12:13 PM
archiveofourown.org/works/716657...
todays bullshit of the day is #crossdust doing ectoswap, which is what i call it when you put your ecto onto ur partner and vice versa
todays bullshit of the day is #crossdust doing ectoswap, which is what i call it when you put your ecto onto ur partner and vice versa
Reposted by SinnySkelle
October 19, 2024 at 4:28 AM
Reposted by SinnySkelle
random popup for @tsunaidamay.bsky.social cuz she heard Kross in the server and went "puppy Kross breeding??" and I *NEEDED* to do this. Also Killer is a cat b/c obviously.
#zenduchessART #undertale #Killer #Cross #Kross #messy #breeding #ecto #fuckedsilly #wrecked #NSFW
#zenduchessART #undertale #Killer #Cross #Kross #messy #breeding #ecto #fuckedsilly #wrecked #NSFW
September 19, 2025 at 11:27 AM
Reposted by SinnySkelle
September 5, 2025 at 10:33 PM
Reposted by SinnySkelle
Warm Waters.
#Leviathantale ⇢ @skumhuu.bsky.social
#Crepic #EpicCross #CrossEpic #Undertail #Undershag #Underfrick
#Leviathantale ⇢ @skumhuu.bsky.social
#Crepic #EpicCross #CrossEpic #Undertail #Undershag #Underfrick
September 13, 2025 at 1:43 AM
Reposted by SinnySkelle
Let's start with some old bad sans poly 🐍 treating Cross to a good time 💅
Part 1 and 2
// Oviposition, Group sex, Lamia //
Part 1 and 2
// Oviposition, Group sex, Lamia //
October 15, 2023 at 5:08 PM
Let's start with some old bad sans poly 🐍 treating Cross to a good time 💅
Part 1 and 2
// Oviposition, Group sex, Lamia //
Part 1 and 2
// Oviposition, Group sex, Lamia //
Reposted by SinnySkelle
i remember making this one for docan
undertail fontcest sacrum lacing papysans
pg 1-3 out of 6
undertail fontcest sacrum lacing papysans
pg 1-3 out of 6
January 6, 2024 at 4:25 AM
i remember making this one for docan
undertail fontcest sacrum lacing papysans
pg 1-3 out of 6
undertail fontcest sacrum lacing papysans
pg 1-3 out of 6
Reposted by SinnySkelle
April 13, 2024 at 11:47 PM
Reposted by SinnySkelle
November 27, 2024 at 7:29 PM
Reposted by SinnySkelle
September 2, 2025 at 12:57 AM
Reposted by SinnySkelle
thats not even plugging up the right thing (but it is a gift killer left earlier)
#undertail #girlswapau #horrordust
#undertail #girlswapau #horrordust
August 28, 2025 at 4:34 PM
thats not even plugging up the right thing (but it is a gift killer left earlier)
#undertail #girlswapau #horrordust
#undertail #girlswapau #horrordust
Reposted by SinnySkelle
old crosspost on my mind again 🩵💜 AU where errorink is new to existence. their spaces combine and result in a long glass pane between them. they're unable to hear or reach the other, so their only means of communication is writing & drawing.
✒️ #undertaleau | #inksans | #errorsans | #errorink
✒️ #undertaleau | #inksans | #errorsans | #errorink
August 23, 2025 at 7:24 PM
old crosspost on my mind again 🩵💜 AU where errorink is new to existence. their spaces combine and result in a long glass pane between them. they're unable to hear or reach the other, so their only means of communication is writing & drawing.
✒️ #undertaleau | #inksans | #errorsans | #errorink
✒️ #undertaleau | #inksans | #errorsans | #errorink
Reposted by SinnySkelle
August 17, 2025 at 8:17 PM
Reposted by SinnySkelle
August 21, 2025 at 5:12 AM
Reposted by SinnySkelle
I am thrilled to announce the full game is now available for download! Please help us spread the word so everyone has a chance to see all the amazing work our 3-person team did! And let us know what you think ^-^!
kasbaka.itch.io/checks-and-b...
kasbaka.itch.io/checks-and-b...
August 17, 2025 at 10:19 AM
I am thrilled to announce the full game is now available for download! Please help us spread the word so everyone has a chance to see all the amazing work our 3-person team did! And let us know what you think ^-^!
kasbaka.itch.io/checks-and-b...
kasbaka.itch.io/checks-and-b...
Reposted by SinnySkelle
Wowie, who needs to pretend airplanes are shooting stars when you've got the real thing?
This Xtalecest piece by Lia is the main piece for August in Live, Laugh, Bone Vol. 2, our 2026 Fontcest wall calendar! Our fanzine is available for preorder in our shop from July 30-Aug 27!
This Xtalecest piece by Lia is the main piece for August in Live, Laugh, Bone Vol. 2, our 2026 Fontcest wall calendar! Our fanzine is available for preorder in our shop from July 30-Aug 27!
August 19, 2025 at 6:02 PM
Wowie, who needs to pretend airplanes are shooting stars when you've got the real thing?
This Xtalecest piece by Lia is the main piece for August in Live, Laugh, Bone Vol. 2, our 2026 Fontcest wall calendar! Our fanzine is available for preorder in our shop from July 30-Aug 27!
This Xtalecest piece by Lia is the main piece for August in Live, Laugh, Bone Vol. 2, our 2026 Fontcest wall calendar! Our fanzine is available for preorder in our shop from July 30-Aug 27!
Reposted by SinnySkelle
Hello and welcome to another - Fontcest Calendar Zine Preview !!! ✨👏🦴
This is my main piece for this years Zine! 🐠 and you can peep 👀 the other art pieces as they are featured @livelaughbone.bsky.social
Pre-Orders are already open! [July 30 - August 27]
#fontcest #theyowiearts
This is my main piece for this years Zine! 🐠 and you can peep 👀 the other art pieces as they are featured @livelaughbone.bsky.social
Pre-Orders are already open! [July 30 - August 27]
#fontcest #theyowiearts
July 31, 2025 at 5:00 AM
Hello and welcome to another - Fontcest Calendar Zine Preview !!! ✨👏🦴
This is my main piece for this years Zine! 🐠 and you can peep 👀 the other art pieces as they are featured @livelaughbone.bsky.social
Pre-Orders are already open! [July 30 - August 27]
#fontcest #theyowiearts
This is my main piece for this years Zine! 🐠 and you can peep 👀 the other art pieces as they are featured @livelaughbone.bsky.social
Pre-Orders are already open! [July 30 - August 27]
#fontcest #theyowiearts