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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?
talented slimy national selfie
  10/11/24
I dunno. What if she has a nice ass?
internet-worthy frozen senate internal respiration
  10/11/24
more detail plz
Odious weed whacker
  10/11/24
...
internet-worthy frozen senate internal respiration
  10/11/24
It probably depends on how much you hate your bio parent and...
curious whorehouse pisswyrm
  10/11/24
do u know what a sister in law is?
glittery chapel goal in life
  10/11/24
he's watched too much porn
Comical Walnut Trailer Park
  10/11/24
Objection, nonresponsive
curious whorehouse pisswyrm
  10/11/24
...
up-to-no-good aphrodisiac pistol
  12/23/25
I do but I prefer fantasizing about my non-existent step sis...
curious whorehouse pisswyrm
  10/11/24
Not sure if this analysis is on point. The less it's justifi...
tan ratface parlour
  10/11/24
sleeping with anyone within your orbit of friends & fami...
crystalline meetinghouse cuckold
  10/11/24
mostly cr
talented slimy national selfie
  10/11/24
...
crawly corner
  10/12/24
this is exactly why I never sleep with my wife
boyish sable persian
  12/23/25
depends on if your wife is dead or not
Comical Walnut Trailer Park
  10/11/24
i believe this is colloquially known as "the biden rule...
crystalline meetinghouse cuckold
  10/11/24
...
Floppy mad cow disease
  11/30/25
only if you don't take pictures to share with us
Filthy institution volcanic crater
  10/11/24
(martin brodeur)
razzmatazz flushed newt degenerate
  10/11/24
Anyone who doesn't at least understand the temptation doesn'...
stubborn party of the first part shitlib
  10/12/24
This. Plus they are always hugging and kissing you.
Exciting regret
  10/12/24
...
Filthy institution volcanic crater
  12/23/25
Wtf
talented slimy national selfie
  10/12/24
This is my life. Constant blue balls.
stubborn party of the first part shitlib
  10/12/24
...
Odious weed whacker
  11/30/25
i'm married to the younger hotter sister, and the temptation...
...,,..;...,,..,..,...,,,;..,
  06/03/26
Is she a spicy Latina?
Self-absorbed aggressive university psychic
  10/12/24
...
Floppy mad cow disease
  11/30/25
Youngest SiL is trim, has a 180 ass and is always kissing me...
Exciting regret
  10/12/24
180
Bateful milk
  10/12/24
...
Motley Abode
  10/12/24
twist: the sil was Catherine of aragorn
Vivacious state
  10/12/24
If first brother was childless then this is classic Levirate...
Frisky Exhilarant Deer Antler Quadroon
  10/12/24
...
Motley Abode
  10/12/24
He's literally the closest replacement for the guy. I can't ...
Frisky Exhilarant Deer Antler Quadroon
  10/12/24
...
Motley Abode
  10/12/24
You're doing it for the purpose of having children, through ...
Frisky Exhilarant Deer Antler Quadroon
  10/13/24
are we talking about your wife's sister or your brother's wi...
frum site friendly grandma
  10/12/24
How many times do we have to go over this.
fuchsia slap-happy messiness prole
  10/12/24
...
razzle-dazzle drunken faggotry ape
  10/12/24
...
Floppy mad cow disease
  11/30/25
...
razzle-dazzle drunken faggotry ape
  12/23/25
...
up-to-no-good aphrodisiac pistol
  12/23/25
...
Abusive massive hospital
  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
maroon free-loading black woman
  10/12/24
voice of reason as always cbtp
talented slimy national selfie
  10/12/24
not as deranged as brother-in-law
Mentally Impaired French Chef
  10/12/24
Wife’s sister or your bros wife = deranged wife&rsq...
insanely creepy bawdyhouse
  12/23/25


Poast new message in this thread



Reply Favorite

Date: October 11th, 2024 4:34 PM
Author: talented slimy national selfie

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

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



Reply Favorite

Date: October 11th, 2024 4:34 PM
Author: internet-worthy frozen senate internal respiration

I dunno. What if she has a nice ass?

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



Reply Favorite

Date: October 11th, 2024 4:35 PM
Author: Odious weed whacker

more detail plz

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



Reply Favorite

Date: October 11th, 2024 4:37 PM
Author: internet-worthy frozen senate internal respiration



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



Reply Favorite

Date: October 11th, 2024 4:40 PM
Author: curious whorehouse pisswyrm

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=2,#48188001)



Reply Favorite

Date: October 11th, 2024 4:41 PM
Author: glittery chapel goal in life

do u know what a sister in law is?

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



Reply Favorite

Date: October 11th, 2024 4:44 PM
Author: Comical Walnut Trailer Park

he's watched too much porn

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



Reply Favorite

Date: October 11th, 2024 7:51 PM
Author: curious whorehouse pisswyrm

Objection, nonresponsive

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



Reply Favorite

Date: December 23rd, 2025 2:44 AM
Author: up-to-no-good aphrodisiac pistol



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



Reply Favorite

Date: October 11th, 2024 7:50 PM
Author: curious whorehouse pisswyrm

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=2,#48188616)



Reply Favorite

Date: October 11th, 2024 8:22 PM
Author: tan ratface parlour

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=2,#48188745)



Reply Favorite

Date: October 11th, 2024 4:42 PM
Author: crystalline meetinghouse cuckold

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

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



Reply Favorite

Date: October 11th, 2024 4:50 PM
Author: talented slimy national selfie

mostly cr

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



Reply Favorite

Date: October 12th, 2024 3:21 PM
Author: crawly corner



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



Reply Favorite

Date: December 23rd, 2025 2:58 AM
Author: boyish sable persian

this is exactly why I never sleep with my wife

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



Reply Favorite

Date: October 11th, 2024 4:44 PM
Author: Comical Walnut Trailer Park

depends on if your wife is dead or not

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



Reply Favorite

Date: October 11th, 2024 4:44 PM
Author: crystalline meetinghouse cuckold

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

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



Reply Favorite

Date: November 30th, 2025 4:48 PM
Author: Floppy mad cow disease



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



Reply Favorite

Date: October 11th, 2024 4:48 PM
Author: Filthy institution volcanic crater

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

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



Reply Favorite

Date: October 11th, 2024 8:14 PM
Author: razzmatazz flushed newt degenerate

(martin brodeur)

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



Reply Favorite

Date: October 12th, 2024 10:56 AM
Author: stubborn party of the first part shitlib

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=2,#48189844)



Reply Favorite

Date: October 12th, 2024 11:38 AM
Author: Exciting regret

This. Plus they are always hugging and kissing you.

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



Reply Favorite

Date: December 23rd, 2025 6:52 AM
Author: Filthy institution volcanic crater



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



Reply Favorite

Date: October 12th, 2024 3:45 PM
Author: talented slimy national selfie

Wtf

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



Reply Favorite

Date: October 12th, 2024 5:01 PM
Author: stubborn party of the first part shitlib

This is my life. Constant blue balls.

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



Reply Favorite

Date: November 30th, 2025 4:44 PM
Author: Odious weed whacker



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



Reply Favorite

Date: October 12th, 2024 11:41 AM
Author: Self-absorbed aggressive university psychic

Is she a spicy Latina?

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



Reply Favorite

Date: November 30th, 2025 4:48 PM
Author: Floppy mad cow disease



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



Reply Favorite

Date: October 12th, 2024 11:44 AM
Author: Exciting regret

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=2,#48189964)



Reply Favorite

Date: October 12th, 2024 3:45 PM
Author: Bateful milk

180

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



Reply Favorite

Date: October 12th, 2024 11:48 AM
Author: Motley Abode



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



Reply Favorite

Date: October 12th, 2024 3:17 PM
Author: Vivacious state

twist: the sil was Catherine of aragorn

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



Reply Favorite

Date: October 12th, 2024 3:20 PM
Author: Frisky Exhilarant Deer Antler Quadroon

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=2,#48190659)



Reply Favorite

Date: October 12th, 2024 3:25 PM
Author: Motley Abode



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



Reply Favorite

Date: October 12th, 2024 3:34 PM
Author: Frisky Exhilarant Deer Antler Quadroon

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=2,#48190707)



Reply Favorite

Date: October 12th, 2024 3:38 PM
Author: Motley Abode



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



Reply Favorite

Date: October 13th, 2024 12:04 AM
Author: Frisky Exhilarant Deer Antler Quadroon

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=2,#48191875)



Reply Favorite

Date: October 12th, 2024 11:50 AM
Author: frum site friendly grandma

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

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



Reply Favorite

Date: October 12th, 2024 11:52 AM
Author: fuchsia slap-happy messiness prole

How many times do we have to go over this.

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



Reply Favorite

Date: October 12th, 2024 4:01 PM
Author: razzle-dazzle drunken faggotry ape



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



Reply Favorite

Date: November 30th, 2025 4:48 PM
Author: Floppy mad cow disease



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



Reply Favorite

Date: December 23rd, 2025 2:34 AM
Author: razzle-dazzle drunken faggotry ape



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



Reply Favorite

Date: December 23rd, 2025 2:46 AM
Author: up-to-no-good aphrodisiac pistol



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



Reply Favorite

Date: December 23rd, 2025 6:43 AM
Author: Abusive massive hospital



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



Reply Favorite

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



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



Reply Favorite

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



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



Reply Favorite

Date: October 12th, 2024 11:51 AM
Author: maroon free-loading black woman

yes

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



Reply Favorite

Date: October 12th, 2024 4:02 PM
Author: talented slimy national selfie

voice of reason as always cbtp

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



Reply Favorite

Date: October 12th, 2024 11:57 AM
Author: Mentally Impaired French Chef

not as deranged as brother-in-law

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



Reply Favorite

Date: December 23rd, 2025 7:03 AM
Author: insanely creepy bawdyhouse

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=2,#49533184)