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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?
Red church
  10/11/24
I dunno. What if she has a nice ass?
yapping stimulating crackhouse volcanic crater
  10/11/24
more detail plz
sickened dun resort gay wizard
  10/11/24
...
yapping stimulating crackhouse volcanic crater
  10/11/24
It probably depends on how much you hate your bio parent and...
Peach big hospital
  10/11/24
do u know what a sister in law is?
Autistic water buffalo
  10/11/24
he's watched too much porn
Flesh histrionic background story
  10/11/24
Objection, nonresponsive
Peach big hospital
  10/11/24
...
crystalline misanthropic chapel rigpig
  12/23/25
I do but I prefer fantasizing about my non-existent step sis...
Peach big hospital
  10/11/24
Not sure if this analysis is on point. The less it's justifi...
arrogant associate
  10/11/24
sleeping with anyone within your orbit of friends & fami...
Hairraiser cheese-eating international law enforcement agency
  10/11/24
mostly cr
Red church
  10/11/24
...
Light step-uncle's house laser beams
  10/12/24
this is exactly why I never sleep with my wife
Adulterous aggressive ticket booth
  12/23/25
depends on if your wife is dead or not
Flesh histrionic background story
  10/11/24
i believe this is colloquially known as "the biden rule...
Hairraiser cheese-eating international law enforcement agency
  10/11/24
...
Cocky Faggot Firefighter
  11/30/25
only if you don't take pictures to share with us
white parlour
  10/11/24
(martin brodeur)
Contagious Codepig Pit
  10/11/24
Anyone who doesn't at least understand the temptation doesn'...
stirring stage
  10/12/24
This. Plus they are always hugging and kissing you.
vibrant high-end meetinghouse philosopher-king
  10/12/24
...
white parlour
  12/23/25
Wtf
Red church
  10/12/24
This is my life. Constant blue balls.
stirring stage
  10/12/24
...
sickened dun resort gay wizard
  11/30/25
i'm married to the younger hotter sister, and the temptation...
...,,..;...,,..,..,...,,,;..,
  06/03/26
Is she a spicy Latina?
Motley Theater Stage
  10/12/24
...
Cocky Faggot Firefighter
  11/30/25
Youngest SiL is trim, has a 180 ass and is always kissing me...
vibrant high-end meetinghouse philosopher-king
  10/12/24
180
supple stag film lettuce
  10/12/24
...
violet locale
  10/12/24
twist: the sil was Catherine of aragorn
sooty heady national depressive
  10/12/24
If first brother was childless then this is classic Levirate...
wine beta affirmative action
  10/12/24
...
violet locale
  10/12/24
He's literally the closest replacement for the guy. I can't ...
wine beta affirmative action
  10/12/24
...
violet locale
  10/12/24
You're doing it for the purpose of having children, through ...
wine beta affirmative action
  10/13/24
are we talking about your wife's sister or your brother's wi...
Cerebral Iridescent Property Cuckold
  10/12/24
How many times do we have to go over this.
Zombie-like Electric Spot Main People
  10/12/24
...
titillating casino striped hyena
  10/12/24
...
Cocky Faggot Firefighter
  11/30/25
...
titillating casino striped hyena
  12/23/25
...
crystalline misanthropic chapel rigpig
  12/23/25
...
vivacious nibblets
  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
arousing apoplectic puppy
  10/12/24
voice of reason as always cbtp
Red church
  10/12/24
not as deranged as brother-in-law
godawful field
  10/12/24
Wife’s sister or your bros wife = deranged wife&rsq...
garnet boistinker station
  12/23/25


Poast new message in this thread



Reply Favorite

Date: October 11th, 2024 4:34 PM
Author: Red church

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: yapping stimulating crackhouse volcanic crater

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: sickened dun resort gay wizard

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: yapping stimulating crackhouse volcanic crater



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



Reply Favorite

Date: October 11th, 2024 4:40 PM
Author: Peach big hospital

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: Autistic water buffalo

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: Flesh histrionic background story

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: Peach big hospital

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: crystalline misanthropic chapel rigpig



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



Reply Favorite

Date: October 11th, 2024 7:50 PM
Author: Peach big hospital

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: arrogant associate

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: Hairraiser cheese-eating international law enforcement agency

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: Red church

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: Light step-uncle's house laser beams



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



Reply Favorite

Date: December 23rd, 2025 2:58 AM
Author: Adulterous aggressive ticket booth

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: Flesh histrionic background story

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: Hairraiser cheese-eating international law enforcement agency

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: Cocky Faggot Firefighter



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



Reply Favorite

Date: October 11th, 2024 4:48 PM
Author: white parlour

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: Contagious Codepig Pit

(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: stirring stage

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: vibrant high-end meetinghouse philosopher-king

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: white parlour



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



Reply Favorite

Date: October 12th, 2024 3:45 PM
Author: Red church

Wtf

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



Reply Favorite

Date: October 12th, 2024 5:01 PM
Author: stirring stage

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: sickened dun resort gay wizard



(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: Motley Theater Stage

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: Cocky Faggot Firefighter



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



Reply Favorite

Date: October 12th, 2024 11:44 AM
Author: vibrant high-end meetinghouse philosopher-king

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: supple stag film lettuce

180

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



Reply Favorite

Date: October 12th, 2024 11:48 AM
Author: violet locale



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



Reply Favorite

Date: October 12th, 2024 3:17 PM
Author: sooty heady national depressive

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: wine beta affirmative action

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: violet locale



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



Reply Favorite

Date: October 12th, 2024 3:34 PM
Author: wine beta affirmative action

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: violet locale



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



Reply Favorite

Date: October 13th, 2024 12:04 AM
Author: wine beta affirmative action

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: Cerebral Iridescent Property Cuckold

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: Zombie-like Electric Spot Main People

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: titillating casino striped hyena



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



Reply Favorite

Date: November 30th, 2025 4:48 PM
Author: Cocky Faggot Firefighter



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



Reply Favorite

Date: December 23rd, 2025 2:34 AM
Author: titillating casino striped hyena



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



Reply Favorite

Date: December 23rd, 2025 2:46 AM
Author: crystalline misanthropic chapel rigpig



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



Reply Favorite

Date: December 23rd, 2025 6:43 AM
Author: vivacious nibblets



(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: arousing apoplectic puppy

yes

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



Reply Favorite

Date: October 12th, 2024 4:02 PM
Author: Red church

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: godawful field

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: garnet boistinker station

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)