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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?
Nubile up-to-no-good pocket flask elastic band
  10/11/24
I dunno. What if she has a nice ass?
splenetic elite dragon parlour
  10/11/24
more detail plz
Pink internal respiration karate
  10/11/24
...
splenetic elite dragon parlour
  10/11/24
It probably depends on how much you hate your bio parent and...
charismatic chestnut station pistol
  10/11/24
do u know what a sister in law is?
cordovan forum immigrant
  10/11/24
he's watched too much porn
Very Tactful Weed Whacker Jewess
  10/11/24
Objection, nonresponsive
charismatic chestnut station pistol
  10/11/24
...
confused bawdyhouse wrinkle
  12/23/25
I do but I prefer fantasizing about my non-existent step sis...
charismatic chestnut station pistol
  10/11/24
Not sure if this analysis is on point. The less it's justifi...
racy lemon locus
  10/11/24
sleeping with anyone within your orbit of friends & fami...
exhilarant anal principal's office
  10/11/24
mostly cr
Nubile up-to-no-good pocket flask elastic band
  10/11/24
...
Iridescent depressive
  10/12/24
this is exactly why I never sleep with my wife
puce frisky shrine people who are hurt
  12/23/25
depends on if your wife is dead or not
Very Tactful Weed Whacker Jewess
  10/11/24
i believe this is colloquially known as "the biden rule...
exhilarant anal principal's office
  10/11/24
...
Provocative Plum Public Bath Gaming Laptop
  11/30/25
only if you don't take pictures to share with us
Cocky corner laser beams
  10/11/24
(martin brodeur)
lascivious filthpig
  10/11/24
Anyone who doesn't at least understand the temptation doesn'...
Abnormal roast beef school
  10/12/24
This. Plus they are always hugging and kissing you.
hairraiser house hissy fit
  10/12/24
...
Cocky corner laser beams
  12/23/25
Wtf
Nubile up-to-no-good pocket flask elastic band
  10/12/24
This is my life. Constant blue balls.
Abnormal roast beef school
  10/12/24
...
Pink internal respiration karate
  11/30/25
i'm married to the younger hotter sister, and the temptation...
Marvelous Sable Juggernaut
  06/03/26
Is she a spicy Latina?
Crystalline aromatic space
  10/12/24
...
Provocative Plum Public Bath Gaming Laptop
  11/30/25
Youngest SiL is trim, has a 180 ass and is always kissing me...
hairraiser house hissy fit
  10/12/24
180
floppy grizzly ape knife
  10/12/24
...
citrine sanctuary
  10/12/24
twist: the sil was Catherine of aragorn
Coral stage
  10/12/24
If first brother was childless then this is classic Levirate...
kink-friendly stimulating multi-billionaire goal in life
  10/12/24
...
citrine sanctuary
  10/12/24
He's literally the closest replacement for the guy. I can't ...
kink-friendly stimulating multi-billionaire goal in life
  10/12/24
...
citrine sanctuary
  10/12/24
You're doing it for the purpose of having children, through ...
kink-friendly stimulating multi-billionaire goal in life
  10/13/24
are we talking about your wife's sister or your brother's wi...
nofapping rigor
  10/12/24
How many times do we have to go over this.
vivacious alcoholic meetinghouse
  10/12/24
...
zippy prole
  10/12/24
...
Provocative Plum Public Bath Gaming Laptop
  11/30/25
...
zippy prole
  12/23/25
...
confused bawdyhouse wrinkle
  12/23/25
...
Histrionic Metal Fat Ankles
  12/23/25
...
zippy prole
  06/03/26
...
180 jet-lagged library
  06/03/26
...
Peach underhanded set
  06/03/26
...
180 jet-lagged library
  06/03/26
yes
Transparent Base
  10/12/24
voice of reason as always cbtp
Nubile up-to-no-good pocket flask elastic band
  10/12/24
not as deranged as brother-in-law
excitant lavender skinny woman
  10/12/24
Wife’s sister or your bros wife = deranged wife&rsq...
Salmon Wild Location
  12/23/25


Poast new message in this thread



Reply Favorite

Date: October 11th, 2024 4:34 PM
Author: Nubile up-to-no-good pocket flask elastic band

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: splenetic elite dragon parlour

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: Pink internal respiration karate

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: splenetic elite dragon parlour



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



Reply Favorite

Date: October 11th, 2024 4:40 PM
Author: charismatic chestnut station pistol

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: cordovan forum immigrant

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: Very Tactful Weed Whacker Jewess

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: charismatic chestnut station pistol

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: confused bawdyhouse wrinkle



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



Reply Favorite

Date: October 11th, 2024 7:50 PM
Author: charismatic chestnut station pistol

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: racy lemon locus

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: exhilarant anal principal's office

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: Nubile up-to-no-good pocket flask elastic band

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: Iridescent depressive



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



Reply Favorite

Date: December 23rd, 2025 2:58 AM
Author: puce frisky shrine people who are hurt

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: Very Tactful Weed Whacker Jewess

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: exhilarant anal principal's office

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: Provocative Plum Public Bath Gaming Laptop



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



Reply Favorite

Date: October 11th, 2024 4:48 PM
Author: Cocky corner laser beams

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: lascivious filthpig

(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: Abnormal roast beef school

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: hairraiser house hissy fit

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: Cocky corner laser beams



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



Reply Favorite

Date: October 12th, 2024 3:45 PM
Author: Nubile up-to-no-good pocket flask elastic band

Wtf

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



Reply Favorite

Date: October 12th, 2024 5:01 PM
Author: Abnormal roast beef school

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: Pink internal respiration karate



(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2#49472629)



Reply Favorite

Date: June 3rd, 2026 4:32 PM
Author: Marvelous Sable Juggernaut

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: Crystalline aromatic space

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: Provocative Plum Public Bath Gaming Laptop



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



Reply Favorite

Date: October 12th, 2024 11:44 AM
Author: hairraiser house hissy fit

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: floppy grizzly ape knife

180

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



Reply Favorite

Date: October 12th, 2024 11:48 AM
Author: citrine sanctuary



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



Reply Favorite

Date: October 12th, 2024 3:17 PM
Author: Coral stage

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: kink-friendly stimulating multi-billionaire goal in life

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: citrine sanctuary



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



Reply Favorite

Date: October 12th, 2024 3:34 PM
Author: kink-friendly stimulating multi-billionaire goal in life

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: citrine sanctuary



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



Reply Favorite

Date: October 13th, 2024 12:04 AM
Author: kink-friendly stimulating multi-billionaire goal in life

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: nofapping rigor

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: vivacious alcoholic meetinghouse

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: zippy prole



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



Reply Favorite

Date: November 30th, 2025 4:48 PM
Author: Provocative Plum Public Bath Gaming Laptop



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



Reply Favorite

Date: December 23rd, 2025 2:34 AM
Author: zippy prole



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



Reply Favorite

Date: December 23rd, 2025 2:46 AM
Author: confused bawdyhouse wrinkle



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



Reply Favorite

Date: December 23rd, 2025 6:43 AM
Author: Histrionic Metal Fat Ankles



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



Reply Favorite

Date: June 3rd, 2026 3:03 PM
Author: zippy prole



(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2#49913228)



Reply Favorite

Date: June 3rd, 2026 3:08 PM
Author: 180 jet-lagged library



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



Reply Favorite

Date: June 3rd, 2026 3:20 PM
Author: Peach underhanded set



(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2#49913261)



Reply Favorite

Date: June 3rd, 2026 4:24 PM
Author: 180 jet-lagged library



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



Reply Favorite

Date: October 12th, 2024 11:51 AM
Author: Transparent Base

yes

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



Reply Favorite

Date: October 12th, 2024 4:02 PM
Author: Nubile up-to-no-good pocket flask elastic band

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: excitant lavender skinny woman

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: Salmon Wild Location

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)