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Having sex with your sister in law is completely deranged, right?

Nobody moral would do this, right? These are just jokes?
Orchid shaky office feces
  10/11/24
I dunno. What if she has a nice ass?
Lascivious bull headed step-uncle's house
  10/11/24
more detail plz
chrome personal credit line
  10/11/24
...
Lascivious bull headed step-uncle's house
  10/11/24
It probably depends on how much you hate your bio parent and...
Fantasy-prone prole coldplay fan
  10/11/24
do u know what a sister in law is?
internet-worthy athletic conference
  10/11/24
he's watched too much porn
Brass ape trump supporter
  10/11/24
Objection, nonresponsive
Fantasy-prone prole coldplay fan
  10/11/24
...
fiercely-loyal roommate
  12/23/25
I do but I prefer fantasizing about my non-existent step sis...
Fantasy-prone prole coldplay fan
  10/11/24
Not sure if this analysis is on point. The less it's justifi...
know-it-all set clown
  10/11/24
sleeping with anyone within your orbit of friends & fami...
charismatic house
  10/11/24
mostly cr
Orchid shaky office feces
  10/11/24
...
canary razzle hominid meetinghouse
  10/12/24
this is exactly why I never sleep with my wife
concupiscible church codepig
  12/23/25
depends on if your wife is dead or not
Brass ape trump supporter
  10/11/24
i believe this is colloquially known as "the biden rule...
charismatic house
  10/11/24
...
Hateful alpha
  11/30/25
only if you don't take pictures to share with us
house-broken home
  10/11/24
(martin brodeur)
Insanely creepy dull quadroon
  10/11/24
Anyone who doesn't at least understand the temptation doesn'...
Nudist Translucent Fat Ankles Lodge
  10/12/24
This. Plus they are always hugging and kissing you.
Mint exhilarant property
  10/12/24
...
house-broken home
  12/23/25
Wtf
Orchid shaky office feces
  10/12/24
This is my life. Constant blue balls.
Nudist Translucent Fat Ankles Lodge
  10/12/24
...
chrome personal credit line
  11/30/25
i'm married to the younger hotter sister, and the temptation...
...,,..;...,,..,..,...,,,;..,
  06/03/26
Is she a spicy Latina?
Drab Confused Wrinkle
  10/12/24
...
Hateful alpha
  11/30/25
Youngest SiL is trim, has a 180 ass and is always kissing me...
Mint exhilarant property
  10/12/24
180
Emerald 180 rigpig
  10/12/24
...
Rough-skinned theater
  10/12/24
twist: the sil was Catherine of aragorn
arousing regret plaza
  10/12/24
If first brother was childless then this is classic Levirate...
cracking metal principal's office
  10/12/24
...
Rough-skinned theater
  10/12/24
He's literally the closest replacement for the guy. I can't ...
cracking metal principal's office
  10/12/24
...
Rough-skinned theater
  10/12/24
You're doing it for the purpose of having children, through ...
cracking metal principal's office
  10/13/24
are we talking about your wife's sister or your brother's wi...
olive gay wizard
  10/12/24
How many times do we have to go over this.
grizzly angry parlor
  10/12/24
...
aqua big hall
  10/12/24
...
Hateful alpha
  11/30/25
...
aqua big hall
  12/23/25
...
fiercely-loyal roommate
  12/23/25
...
Magenta vivacious people who are hurt knife
  12/23/25
...
gedood persoon
  06/03/26
...
Emilio Estevez circa 2032
  06/03/26
...
Mailer Daemon
  06/03/26
...
Emilio Estevez circa 2032
  06/03/26
yes
silver dilemma factory reset button
  10/12/24
voice of reason as always cbtp
Orchid shaky office feces
  10/12/24
not as deranged as brother-in-law
claret parlour pervert
  10/12/24
Wife’s sister or your bros wife = deranged wife&rsq...
brilliant toaster sanctuary
  12/23/25


Poast new message in this thread



Reply Favorite

Date: October 11th, 2024 4:34 PM
Author: Orchid shaky office feces

Nobody moral would do this, right? These are just jokes?

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48187983)



Reply Favorite

Date: October 11th, 2024 4:34 PM
Author: Lascivious bull headed step-uncle's house

I dunno. What if she has a nice ass?

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48187985)



Reply Favorite

Date: October 11th, 2024 4:35 PM
Author: chrome personal credit line

more detail plz

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48187988)



Reply Favorite

Date: October 11th, 2024 4:37 PM
Author: Lascivious bull headed step-uncle's house



(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48187993)



Reply Favorite

Date: October 11th, 2024 4:40 PM
Author: Fantasy-prone prole coldplay fan

It probably depends on how much you hate your bio parent and stepparent. If eg I was a Chadly 16 year old and a drunk, verbally abusive stepdad moved into my house with me and my mom, and he brought along his hot 15 year old daughter, I could see how fucking the shit out of his 15 year old daughter might be beneficial for me and my mom.

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48188001)



Reply Favorite

Date: October 11th, 2024 4:41 PM
Author: internet-worthy athletic conference

do u know what a sister in law is?

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48188004)



Reply Favorite

Date: October 11th, 2024 4:44 PM
Author: Brass ape trump supporter

he's watched too much porn

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48188017)



Reply Favorite

Date: October 11th, 2024 7:51 PM
Author: Fantasy-prone prole coldplay fan

Objection, nonresponsive

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48188617)



Reply Favorite

Date: December 23rd, 2025 2:44 AM
Author: fiercely-loyal roommate



(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#49533041)



Reply Favorite

Date: October 11th, 2024 7:50 PM
Author: Fantasy-prone prole coldplay fan

I do but I prefer fantasizing about my non-existent step sister. I originally meant to go back to the beginning of this and add some intro that set up the pivot, but I forgot to do that.

Given the XO stipulation that we’re limiting the discussion to wife’s sister and brother’s wife is obviously off limits, it would require a wife that is truly evil and awful to justify it, and no kids can be involved for anyone. That said, it would be literally the greatest spite sex ever, if justified, and also a real life-threatening peak experience since by definition any wife awful enough to deserve to get cucked by her own sister would be fully capable of murdering both of you. So in that 1/100k scenario where you made the mistake of marrying the literal devil it’s not only justified it’s incredibly hot.

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48188616)



Reply Favorite

Date: October 11th, 2024 8:22 PM
Author: know-it-all set clown

Not sure if this analysis is on point. The less it's justified the hotter it is imo

Scandal is the very foundation of the SIL Fetish

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48188745)



Reply Favorite

Date: October 11th, 2024 4:42 PM
Author: charismatic house

sleeping with anyone within your orbit of friends & family is insane and doomed

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48188009)



Reply Favorite

Date: October 11th, 2024 4:50 PM
Author: Orchid shaky office feces

mostly cr

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48188040)



Reply Favorite

Date: October 12th, 2024 3:21 PM
Author: canary razzle hominid meetinghouse



(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48190661)



Reply Favorite

Date: December 23rd, 2025 2:58 AM
Author: concupiscible church codepig

this is exactly why I never sleep with my wife

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#49533050)



Reply Favorite

Date: October 11th, 2024 4:44 PM
Author: Brass ape trump supporter

depends on if your wife is dead or not

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48188014)



Reply Favorite

Date: October 11th, 2024 4:44 PM
Author: charismatic house

i believe this is colloquially known as "the biden rule"

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48188018)



Reply Favorite

Date: November 30th, 2025 4:48 PM
Author: Hateful alpha



(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#49472648)



Reply Favorite

Date: October 11th, 2024 4:48 PM
Author: house-broken home

only if you don't take pictures to share with us

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48188026)



Reply Favorite

Date: October 11th, 2024 8:14 PM
Author: Insanely creepy dull quadroon

(martin brodeur)

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48188717)



Reply Favorite

Date: October 12th, 2024 10:56 AM
Author: Nudist Translucent Fat Ankles Lodge

Anyone who doesn't at least understand the temptation doesn't have a hotter young SiL.

It's a combination of many factors. She's a hotter, younger version of your wife (who you were already naturally attracted to--they share the same genes).

She's often proximate to you including during revealing, semi-intimate moments--e.g., lounging around in her robe, changing adjacent to go to the beach, at the pool in her bikini, at a cabin getting dressed in the morning, casually walking into your room while you're getting dressed, asking you to pass her a towel, etc.

The SiL has a natural temptation and desire--this can be conscious or subconscious--to fuck with her sister like all good classic fucked up female relationships and one obvious way to do it is to tempt the sister's husband.

It's a toxic stew that results in you constantly having a throbbing cock around your SiL's pendulous breasts and warm luscious hairy honeypit that she semi-regularly flashes you with even as your rational mind tells you this would be the worst decision you ever made because inevitably it will come back to haunt you and blow up your life.

Thank

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48189844)



Reply Favorite

Date: October 12th, 2024 11:38 AM
Author: Mint exhilarant property

This. Plus they are always hugging and kissing you.

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48189951)



Reply Favorite

Date: December 23rd, 2025 6:52 AM
Author: house-broken home



(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#49533178)



Reply Favorite

Date: October 12th, 2024 3:45 PM
Author: Orchid shaky office feces

Wtf

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48190745)



Reply Favorite

Date: October 12th, 2024 5:01 PM
Author: Nudist Translucent Fat Ankles Lodge

This is my life. Constant blue balls.

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48190953)



Reply Favorite

Date: November 30th, 2025 4:44 PM
Author: chrome personal credit line



(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#49472629)



Reply Favorite

Date: June 3rd, 2026 4:32 PM
Author: ...,,..;...,,..,..,...,,,;..,


i'm married to the younger hotter sister, and the temptation is still 100% there for the older less-hot SIL for exactly the same reasons you mentioned.

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#49913429)



Reply Favorite

Date: October 12th, 2024 11:41 AM
Author: Drab Confused Wrinkle

Is she a spicy Latina?

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48189956)



Reply Favorite

Date: November 30th, 2025 4:48 PM
Author: Hateful alpha



(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#49472649)



Reply Favorite

Date: October 12th, 2024 11:44 AM
Author: Mint exhilarant property

Youngest SiL is trim, has a 180 ass and is always kissing me on the lips. Hard not to think about it.

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48189964)



Reply Favorite

Date: October 12th, 2024 3:45 PM
Author: Emerald 180 rigpig

180

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48190744)



Reply Favorite

Date: October 12th, 2024 11:48 AM
Author: Rough-skinned theater



(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48189979)



Reply Favorite

Date: October 12th, 2024 3:17 PM
Author: arousing regret plaza

twist: the sil was Catherine of aragorn

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48190647)



Reply Favorite

Date: October 12th, 2024 3:20 PM
Author: cracking metal principal's office

If first brother was childless then this is classic Levirate marriage out of Deuteronomy

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48190659)



Reply Favorite

Date: October 12th, 2024 3:25 PM
Author: Rough-skinned theater



(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48190672)



Reply Favorite

Date: October 12th, 2024 3:34 PM
Author: cracking metal principal's office

He's literally the closest replacement for the guy. I can't think of anything more natural.

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48190707)



Reply Favorite

Date: October 12th, 2024 3:38 PM
Author: Rough-skinned theater



(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48190723)



Reply Favorite

Date: October 13th, 2024 12:04 AM
Author: cracking metal principal's office

You're doing it for the purpose of having children, through whom your brother lives on. Nothing could be a bigger solid for the guy.

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48191875)



Reply Favorite

Date: October 12th, 2024 11:50 AM
Author: olive gay wizard

are we talking about your wife's sister or your brother's wife?

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48189984)



Reply Favorite

Date: October 12th, 2024 11:52 AM
Author: grizzly angry parlor

How many times do we have to go over this.

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48189992)



Reply Favorite

Date: October 12th, 2024 4:01 PM
Author: aqua big hall



(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48190799)



Reply Favorite

Date: November 30th, 2025 4:48 PM
Author: Hateful alpha



(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#49472653)



Reply Favorite

Date: December 23rd, 2025 2:34 AM
Author: aqua big hall



(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#49533037)



Reply Favorite

Date: December 23rd, 2025 2:46 AM
Author: fiercely-loyal roommate



(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#49533043)



Reply Favorite

Date: December 23rd, 2025 6:43 AM
Author: Magenta vivacious people who are hurt knife



(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#49533170)



Reply Favorite

Date: June 3rd, 2026 3:03 PM
Author: gedood persoon



(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#49913228)



Reply Favorite

Date: June 3rd, 2026 3:08 PM
Author: Emilio Estevez circa 2032



(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#49913235)



Reply Favorite

Date: June 3rd, 2026 3:20 PM
Author: Mailer Daemon



(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#49913261)



Reply Favorite

Date: June 3rd, 2026 4:24 PM
Author: Emilio Estevez circa 2032



(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#49913390)



Reply Favorite

Date: October 12th, 2024 11:51 AM
Author: silver dilemma factory reset button

yes

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48189990)



Reply Favorite

Date: October 12th, 2024 4:02 PM
Author: Orchid shaky office feces

voice of reason as always cbtp

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48190802)



Reply Favorite

Date: October 12th, 2024 11:57 AM
Author: claret parlour pervert

not as deranged as brother-in-law

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#48190004)



Reply Favorite

Date: December 23rd, 2025 7:03 AM
Author: brilliant toaster sanctuary

Wife’s sister or your bros wife = deranged

wife’s bros wife = still deranged but less so

Sister of BIL or SIL not directly related to your wife = fair game except for the whole infidelity thing

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2Reputation#49533184)