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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?
Rusted electric institution
  10/11/24
I dunno. What if she has a nice ass?
shimmering big casino patrolman
  10/11/24
more detail plz
Exhilarant Cerise Sanctuary
  10/11/24
...
shimmering big casino patrolman
  10/11/24
It probably depends on how much you hate your bio parent and...
Adulterous address skinny woman
  10/11/24
do u know what a sister in law is?
appetizing ultramarine pit
  10/11/24
he's watched too much porn
Bisexual toaster
  10/11/24
Objection, nonresponsive
Adulterous address skinny woman
  10/11/24
...
supple snowy plaza hunting ground
  12/23/25
I do but I prefer fantasizing about my non-existent step sis...
Adulterous address skinny woman
  10/11/24
Not sure if this analysis is on point. The less it's justifi...
Mind-boggling dopamine spot
  10/11/24
sleeping with anyone within your orbit of friends & fami...
big-titted bawdyhouse
  10/11/24
mostly cr
Rusted electric institution
  10/11/24
...
Zippy Mahogany Parlour Really Tough Guy
  10/12/24
this is exactly why I never sleep with my wife
Vigorous persian
  12/23/25
depends on if your wife is dead or not
Bisexual toaster
  10/11/24
i believe this is colloquially known as "the biden rule...
big-titted bawdyhouse
  10/11/24
...
galvanic hyperactive indirect expression
  11/30/25
only if you don't take pictures to share with us
Very tactful windowlicker toilet seat
  10/11/24
(martin brodeur)
boyish mewling ceo marketing idea
  10/11/24
Anyone who doesn't at least understand the temptation doesn'...
Pontificating Office
  10/12/24
This. Plus they are always hugging and kissing you.
Poppy puppy
  10/12/24
...
Very tactful windowlicker toilet seat
  12/23/25
Wtf
Rusted electric institution
  10/12/24
This is my life. Constant blue balls.
Pontificating Office
  10/12/24
...
Exhilarant Cerise Sanctuary
  11/30/25
i'm married to the younger hotter sister, and the temptation...
...,,..;...,,..,..,...,,,;..,
  06/03/26
Is she a spicy Latina?
Puce cruise ship faggotry
  10/12/24
...
galvanic hyperactive indirect expression
  11/30/25
Youngest SiL is trim, has a 180 ass and is always kissing me...
Poppy puppy
  10/12/24
180
Magenta reading party
  10/12/24
...
Dead coral tanning salon queen of the night
  10/12/24
twist: the sil was Catherine of aragorn
Vivacious locale
  10/12/24
If first brother was childless then this is classic Levirate...
Bipolar Kitchen Trust Fund
  10/12/24
...
Dead coral tanning salon queen of the night
  10/12/24
He's literally the closest replacement for the guy. I can't ...
Bipolar Kitchen Trust Fund
  10/12/24
...
Dead coral tanning salon queen of the night
  10/12/24
You're doing it for the purpose of having children, through ...
Bipolar Kitchen Trust Fund
  10/13/24
are we talking about your wife's sister or your brother's wi...
Mint cracking senate
  10/12/24
How many times do we have to go over this.
costumed hell
  10/12/24
...
Histrionic Cumskin Coldplay Fan
  10/12/24
...
galvanic hyperactive indirect expression
  11/30/25
...
Histrionic Cumskin Coldplay Fan
  12/23/25
...
supple snowy plaza hunting ground
  12/23/25
...
seedy chapel
  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
chocolate step-uncle's house incel
  10/12/24
voice of reason as always cbtp
Rusted electric institution
  10/12/24
not as deranged as brother-in-law
dark circlehead principal's office
  10/12/24
Wife’s sister or your bros wife = deranged wife&rsq...
Azure hairraiser site french chef
  12/23/25


Poast new message in this thread



Reply Favorite

Date: October 11th, 2024 4:34 PM
Author: Rusted electric institution

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: shimmering big casino patrolman

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: Exhilarant Cerise Sanctuary

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: shimmering big casino patrolman



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



Reply Favorite

Date: October 11th, 2024 4:40 PM
Author: Adulterous address skinny woman

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: appetizing ultramarine pit

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: Bisexual toaster

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: Adulterous address skinny woman

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: supple snowy plaza hunting ground



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



Reply Favorite

Date: October 11th, 2024 7:50 PM
Author: Adulterous address skinny woman

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: Mind-boggling dopamine spot

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: big-titted bawdyhouse

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: Rusted electric institution

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: Zippy Mahogany Parlour Really Tough Guy



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



Reply Favorite

Date: December 23rd, 2025 2:58 AM
Author: Vigorous 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: Bisexual toaster

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: big-titted bawdyhouse

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: galvanic hyperactive indirect expression



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



Reply Favorite

Date: October 11th, 2024 4:48 PM
Author: Very tactful windowlicker toilet seat

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: boyish mewling ceo marketing idea

(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: Pontificating Office

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: Poppy puppy

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: Very tactful windowlicker toilet seat



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



Reply Favorite

Date: October 12th, 2024 3:45 PM
Author: Rusted electric institution

Wtf

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



Reply Favorite

Date: October 12th, 2024 5:01 PM
Author: Pontificating Office

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: Exhilarant Cerise Sanctuary



(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: Puce cruise ship faggotry

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: galvanic hyperactive indirect expression



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



Reply Favorite

Date: October 12th, 2024 11:44 AM
Author: Poppy puppy

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: Magenta reading party

180

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



Reply Favorite

Date: October 12th, 2024 11:48 AM
Author: Dead coral tanning salon queen of the night



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



Reply Favorite

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

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: Bipolar Kitchen Trust Fund

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: Dead coral tanning salon queen of the night



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



Reply Favorite

Date: October 12th, 2024 3:34 PM
Author: Bipolar Kitchen Trust Fund

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: Dead coral tanning salon queen of the night



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



Reply Favorite

Date: October 13th, 2024 12:04 AM
Author: Bipolar Kitchen Trust Fund

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: Mint cracking senate

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: costumed hell

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: Histrionic Cumskin Coldplay Fan



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



Reply Favorite

Date: November 30th, 2025 4:48 PM
Author: galvanic hyperactive indirect expression



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



Reply Favorite

Date: December 23rd, 2025 2:34 AM
Author: Histrionic Cumskin Coldplay Fan



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



Reply Favorite

Date: December 23rd, 2025 2:46 AM
Author: supple snowy plaza hunting ground



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



Reply Favorite

Date: December 23rd, 2025 6:43 AM
Author: seedy chapel



(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: chocolate step-uncle's house incel

yes

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



Reply Favorite

Date: October 12th, 2024 4:02 PM
Author: Rusted electric institution

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: dark circlehead principal's office

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: Azure hairraiser site french chef

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)