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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?
judgmental voyeur party of the first part
  10/11/24
I dunno. What if she has a nice ass?
flatulent dull generalized bond property
  10/11/24
more detail plz
Khaki meetinghouse
  10/11/24
...
flatulent dull generalized bond property
  10/11/24
It probably depends on how much you hate your bio parent and...
Appetizing Bawdyhouse Mental Disorder
  10/11/24
do u know what a sister in law is?
Magenta Market
  10/11/24
he's watched too much porn
Up-to-no-good indigo principal's office
  10/11/24
Objection, nonresponsive
Appetizing Bawdyhouse Mental Disorder
  10/11/24
...
Stirring maroon parlour therapy
  12/23/25
I do but I prefer fantasizing about my non-existent step sis...
Appetizing Bawdyhouse Mental Disorder
  10/11/24
Not sure if this analysis is on point. The less it's justifi...
laughsome awkward den
  10/11/24
sleeping with anyone within your orbit of friends & fami...
Electric amber fortuitous meteor ladyboy
  10/11/24
mostly cr
judgmental voyeur party of the first part
  10/11/24
...
Mauve fantasy-prone parlor
  10/12/24
this is exactly why I never sleep with my wife
excitant wrinkle
  12/23/25
depends on if your wife is dead or not
Up-to-no-good indigo principal's office
  10/11/24
i believe this is colloquially known as "the biden rule...
Electric amber fortuitous meteor ladyboy
  10/11/24
...
Anal lime hissy fit associate
  11/30/25
only if you don't take pictures to share with us
translucent effete church building
  10/11/24
(martin brodeur)
Silver degenerate area
  10/11/24
Anyone who doesn't at least understand the temptation doesn'...
Pearly box office
  10/12/24
This. Plus they are always hugging and kissing you.
Hideous Hot Mad-dog Skullcap
  10/12/24
...
translucent effete church building
  12/23/25
Wtf
judgmental voyeur party of the first part
  10/12/24
This is my life. Constant blue balls.
Pearly box office
  10/12/24
...
Khaki meetinghouse
  11/30/25
i'm married to the younger hotter sister, and the temptation...
...,,..;...,,..,..,...,,,;..,
  06/03/26
Is she a spicy Latina?
Onyx Heady Gas Station Volcanic Crater
  10/12/24
...
Anal lime hissy fit associate
  11/30/25
Youngest SiL is trim, has a 180 ass and is always kissing me...
Hideous Hot Mad-dog Skullcap
  10/12/24
180
Bat-shit-crazy Laser Beams Pit
  10/12/24
...
soul-stirring state
  10/12/24
twist: the sil was Catherine of aragorn
Alcoholic lilac space
  10/12/24
If first brother was childless then this is classic Levirate...
180 sweet tailpipe
  10/12/24
...
soul-stirring state
  10/12/24
He's literally the closest replacement for the guy. I can't ...
180 sweet tailpipe
  10/12/24
...
soul-stirring state
  10/12/24
You're doing it for the purpose of having children, through ...
180 sweet tailpipe
  10/13/24
are we talking about your wife's sister or your brother's wi...
territorial lavender menage
  10/12/24
How many times do we have to go over this.
Histrionic Really Tough Guy Ticket Booth
  10/12/24
...
claret base
  10/12/24
...
Anal lime hissy fit associate
  11/30/25
...
claret base
  12/23/25
...
Stirring maroon parlour therapy
  12/23/25
...
Charismatic tank
  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
domesticated partner
  10/12/24
voice of reason as always cbtp
judgmental voyeur party of the first part
  10/12/24
not as deranged as brother-in-law
razzle mediation garrison
  10/12/24
Wife’s sister or your bros wife = deranged wife&rsq...
Nubile Walnut Striped Hyena Fanboi
  12/23/25


Poast new message in this thread



Reply Favorite

Date: October 11th, 2024 4:34 PM
Author: judgmental voyeur party of the first part

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: flatulent dull generalized bond property

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: Khaki meetinghouse

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: flatulent dull generalized bond property



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



Reply Favorite

Date: October 11th, 2024 4:40 PM
Author: Appetizing Bawdyhouse Mental Disorder

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: Magenta Market

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: Up-to-no-good indigo principal's office

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: Appetizing Bawdyhouse Mental Disorder

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: Stirring maroon parlour therapy



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



Reply Favorite

Date: October 11th, 2024 7:50 PM
Author: Appetizing Bawdyhouse Mental Disorder

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: laughsome awkward den

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: Electric amber fortuitous meteor ladyboy

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: judgmental voyeur party of the first part

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: Mauve fantasy-prone parlor



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



Reply Favorite

Date: December 23rd, 2025 2:58 AM
Author: excitant wrinkle

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: Up-to-no-good indigo principal's office

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: Electric amber fortuitous meteor ladyboy

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: Anal lime hissy fit associate



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



Reply Favorite

Date: October 11th, 2024 4:48 PM
Author: translucent effete church building

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: Silver degenerate area

(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: Pearly box 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: Hideous Hot Mad-dog Skullcap

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: translucent effete church building



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



Reply Favorite

Date: October 12th, 2024 3:45 PM
Author: judgmental voyeur party of the first part

Wtf

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



Reply Favorite

Date: October 12th, 2024 5:01 PM
Author: Pearly box 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: Khaki meetinghouse



(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: Onyx Heady Gas Station Volcanic Crater

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: Anal lime hissy fit associate



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



Reply Favorite

Date: October 12th, 2024 11:44 AM
Author: Hideous Hot Mad-dog Skullcap

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: Bat-shit-crazy Laser Beams Pit

180

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



Reply Favorite

Date: October 12th, 2024 11:48 AM
Author: soul-stirring state



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



Reply Favorite

Date: October 12th, 2024 3:17 PM
Author: Alcoholic lilac space

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: 180 sweet tailpipe

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: soul-stirring state



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



Reply Favorite

Date: October 12th, 2024 3:34 PM
Author: 180 sweet tailpipe

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: soul-stirring state



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



Reply Favorite

Date: October 13th, 2024 12:04 AM
Author: 180 sweet tailpipe

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: territorial lavender menage

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: Histrionic Really Tough Guy Ticket Booth

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: claret base



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



Reply Favorite

Date: November 30th, 2025 4:48 PM
Author: Anal lime hissy fit associate



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



Reply Favorite

Date: December 23rd, 2025 2:34 AM
Author: claret base



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



Reply Favorite

Date: December 23rd, 2025 2:46 AM
Author: Stirring maroon parlour therapy



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



Reply Favorite

Date: December 23rd, 2025 6:43 AM
Author: Charismatic tank



(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: domesticated partner

yes

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



Reply Favorite

Date: October 12th, 2024 4:02 PM
Author: judgmental voyeur party of the first part

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: razzle mediation garrison

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: Nubile Walnut Striped Hyena Fanboi

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)