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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?
Razzle-dazzle gas station
  10/11/24
I dunno. What if she has a nice ass?
Supple Balding Generalized Bond Space
  10/11/24
more detail plz
Cracking Sick Lay
  10/11/24
...
Supple Balding Generalized Bond Space
  10/11/24
It probably depends on how much you hate your bio parent and...
talented violent stock car theater
  10/11/24
do u know what a sister in law is?
Arousing Dragon
  10/11/24
he's watched too much porn
costumed jade roast beef forum
  10/11/24
Objection, nonresponsive
talented violent stock car theater
  10/11/24
...
stimulating school cafeteria personal credit line
  12/23/25
I do but I prefer fantasizing about my non-existent step sis...
talented violent stock car theater
  10/11/24
Not sure if this analysis is on point. The less it's justifi...
charismatic heaven useless brakes
  10/11/24
sleeping with anyone within your orbit of friends & fami...
Pink Alcoholic Resort
  10/11/24
mostly cr
Razzle-dazzle gas station
  10/11/24
...
cheese-eating rehab
  10/12/24
this is exactly why I never sleep with my wife
turquoise autistic orchestra pit
  12/23/25
depends on if your wife is dead or not
costumed jade roast beef forum
  10/11/24
i believe this is colloquially known as "the biden rule...
Pink Alcoholic Resort
  10/11/24
...
Shivering twisted station juggernaut
  11/30/25
only if you don't take pictures to share with us
heady very tactful pisswyrm
  10/11/24
(martin brodeur)
Bearded Gaming Laptop Ratface
  10/11/24
Anyone who doesn't at least understand the temptation doesn'...
Purple Locus
  10/12/24
This. Plus they are always hugging and kissing you.
Startling Coldplay Fan Temple
  10/12/24
...
heady very tactful pisswyrm
  12/23/25
Wtf
Razzle-dazzle gas station
  10/12/24
This is my life. Constant blue balls.
Purple Locus
  10/12/24
...
Cracking Sick Lay
  11/30/25
i'm married to the younger hotter sister, and the temptation...
...,,..;...,,..,..,...,,,;..,
  06/03/26
Is she a spicy Latina?
poppy 180 library
  10/12/24
...
Shivering twisted station juggernaut
  11/30/25
Youngest SiL is trim, has a 180 ass and is always kissing me...
Startling Coldplay Fan Temple
  10/12/24
180
laughsome wine native
  10/12/24
...
flushed odious bbw
  10/12/24
twist: the sil was Catherine of aragorn
massive histrionic whorehouse hominid
  10/12/24
If first brother was childless then this is classic Levirate...
hyperactive church
  10/12/24
...
flushed odious bbw
  10/12/24
He's literally the closest replacement for the guy. I can't ...
hyperactive church
  10/12/24
...
flushed odious bbw
  10/12/24
You're doing it for the purpose of having children, through ...
hyperactive church
  10/13/24
are we talking about your wife's sister or your brother's wi...
titillating indian lodge depressive
  10/12/24
How many times do we have to go over this.
Copper metal locale
  10/12/24
...
Puce Racy Associate Idiot
  10/12/24
...
Shivering twisted station juggernaut
  11/30/25
...
Puce Racy Associate Idiot
  12/23/25
...
stimulating school cafeteria personal credit line
  12/23/25
...
Fuchsia diverse public bath
  12/23/25
...
gedood persoon
  06/03/26
...
Bellevue therapy dog tp
  06/03/26
...
Mailer Daemon
  06/03/26
...
Bellevue therapy dog tp
  06/03/26
yes
Marvelous Theatre
  10/12/24
voice of reason as always cbtp
Razzle-dazzle gas station
  10/12/24
not as deranged as brother-in-law
rose trailer park tank
  10/12/24
Wife’s sister or your bros wife = deranged wife&rsq...
Vivacious Outnumbered Stag Film
  12/23/25


Poast new message in this thread



Reply Favorite

Date: October 11th, 2024 4:34 PM
Author: Razzle-dazzle gas station

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: Supple Balding Generalized Bond Space

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: Cracking Sick Lay

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: Supple Balding Generalized Bond Space



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



Reply Favorite

Date: October 11th, 2024 4:40 PM
Author: talented violent stock car theater

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: Arousing Dragon

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: costumed jade roast beef forum

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: talented violent stock car theater

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: stimulating school cafeteria personal credit line



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



Reply Favorite

Date: October 11th, 2024 7:50 PM
Author: talented violent stock car theater

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: charismatic heaven useless brakes

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: Pink Alcoholic Resort

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: Razzle-dazzle gas station

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: cheese-eating rehab



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



Reply Favorite

Date: December 23rd, 2025 2:58 AM
Author: turquoise autistic orchestra pit

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: costumed jade roast beef forum

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: Pink Alcoholic Resort

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: Shivering twisted station juggernaut



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



Reply Favorite

Date: October 11th, 2024 4:48 PM
Author: heady very tactful pisswyrm

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: Bearded Gaming Laptop Ratface

(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: Purple Locus

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: Startling Coldplay Fan Temple

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: heady very tactful pisswyrm



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



Reply Favorite

Date: October 12th, 2024 3:45 PM
Author: Razzle-dazzle gas station

Wtf

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



Reply Favorite

Date: October 12th, 2024 5:01 PM
Author: Purple Locus

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: Cracking Sick Lay



(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: poppy 180 library

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: Shivering twisted station juggernaut



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



Reply Favorite

Date: October 12th, 2024 11:44 AM
Author: Startling Coldplay Fan Temple

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: laughsome wine native

180

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



Reply Favorite

Date: October 12th, 2024 11:48 AM
Author: flushed odious bbw



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



Reply Favorite

Date: October 12th, 2024 3:17 PM
Author: massive histrionic whorehouse hominid

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: hyperactive church

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: flushed odious bbw



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



Reply Favorite

Date: October 12th, 2024 3:34 PM
Author: hyperactive church

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: flushed odious bbw



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



Reply Favorite

Date: October 13th, 2024 12:04 AM
Author: hyperactive church

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: titillating indian lodge depressive

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: Copper metal locale

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: Puce Racy Associate Idiot



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



Reply Favorite

Date: November 30th, 2025 4:48 PM
Author: Shivering twisted station juggernaut



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



Reply Favorite

Date: December 23rd, 2025 2:34 AM
Author: Puce Racy Associate Idiot



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



Reply Favorite

Date: December 23rd, 2025 2:46 AM
Author: stimulating school cafeteria personal credit line



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



Reply Favorite

Date: December 23rd, 2025 6:43 AM
Author: Fuchsia diverse public bath



(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: Bellevue therapy dog tp



(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: Bellevue therapy dog tp



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



Reply Favorite

Date: October 12th, 2024 11:51 AM
Author: Marvelous Theatre

yes

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



Reply Favorite

Date: October 12th, 2024 4:02 PM
Author: Razzle-dazzle gas station

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: rose trailer park tank

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: Vivacious Outnumbered Stag Film

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)