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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?
burgundy vigorous indirect expression
  10/11/24
I dunno. What if she has a nice ass?
Cerebral metal gas station affirmative action
  10/11/24
more detail plz
soggy skinny woman
  10/11/24
...
Cerebral metal gas station affirmative action
  10/11/24
It probably depends on how much you hate your bio parent and...
bright jew windowlicker
  10/11/24
do u know what a sister in law is?
jet-lagged gunner indian lodge
  10/11/24
he's watched too much porn
bonkers church building milk
  10/11/24
Objection, nonresponsive
bright jew windowlicker
  10/11/24
...
swashbuckling poppy piazza
  12/23/25
I do but I prefer fantasizing about my non-existent step sis...
bright jew windowlicker
  10/11/24
Not sure if this analysis is on point. The less it's justifi...
Dun soul-stirring native
  10/11/24
sleeping with anyone within your orbit of friends & fami...
Bistre Masturbator
  10/11/24
mostly cr
burgundy vigorous indirect expression
  10/11/24
...
Appetizing Foreskin
  10/12/24
this is exactly why I never sleep with my wife
Adventurous Confused Station
  12/23/25
depends on if your wife is dead or not
bonkers church building milk
  10/11/24
i believe this is colloquially known as "the biden rule...
Bistre Masturbator
  10/11/24
...
Aromatic embarrassed to the bone base
  11/30/25
only if you don't take pictures to share with us
arousing fiercely-loyal potus tanning salon
  10/11/24
(martin brodeur)
Fantasy-prone Pocket Flask Chapel
  10/11/24
Anyone who doesn't at least understand the temptation doesn'...
Mind-boggling corner
  10/12/24
This. Plus they are always hugging and kissing you.
Laughsome liquid oxygen rehab
  10/12/24
...
arousing fiercely-loyal potus tanning salon
  12/23/25
Wtf
burgundy vigorous indirect expression
  10/12/24
This is my life. Constant blue balls.
Mind-boggling corner
  10/12/24
...
soggy skinny woman
  11/30/25
i'm married to the younger hotter sister, and the temptation...
...,,..;...,,..,..,...,,,;..,
  06/03/26
Is she a spicy Latina?
overrated yapping prole
  10/12/24
...
Aromatic embarrassed to the bone base
  11/30/25
Youngest SiL is trim, has a 180 ass and is always kissing me...
Laughsome liquid oxygen rehab
  10/12/24
180
Startled dilemma
  10/12/24
...
flirting principal's office
  10/12/24
twist: the sil was Catherine of aragorn
pearl chest-beating knife private investor
  10/12/24
If first brother was childless then this is classic Levirate...
Passionate fluffy fat ankles
  10/12/24
...
flirting principal's office
  10/12/24
He's literally the closest replacement for the guy. I can't ...
Passionate fluffy fat ankles
  10/12/24
...
flirting principal's office
  10/12/24
You're doing it for the purpose of having children, through ...
Passionate fluffy fat ankles
  10/13/24
are we talking about your wife's sister or your brother's wi...
walnut spectacular boiling water menage
  10/12/24
How many times do we have to go over this.
180 haunted graveyard mad-dog skullcap
  10/12/24
...
electric mediation
  10/12/24
...
Aromatic embarrassed to the bone base
  11/30/25
...
electric mediation
  12/23/25
...
swashbuckling poppy piazza
  12/23/25
...
saffron awkward jewess
  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
Fragrant turquoise public bath
  10/12/24
voice of reason as always cbtp
burgundy vigorous indirect expression
  10/12/24
not as deranged as brother-in-law
vibrant bbw
  10/12/24
Wife’s sister or your bros wife = deranged wife&rsq...
Flickering roast beef
  12/23/25


Poast new message in this thread



Reply Favorite

Date: October 11th, 2024 4:34 PM
Author: burgundy vigorous indirect expression

Nobody moral would do this, right? These are just jokes?

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2...id#48187983)



Reply Favorite

Date: October 11th, 2024 4:34 PM
Author: Cerebral metal gas station affirmative action

I dunno. What if she has a nice ass?

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2...id#48187985)



Reply Favorite

Date: October 11th, 2024 4:35 PM
Author: soggy skinny woman

more detail plz

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2...id#48187988)



Reply Favorite

Date: October 11th, 2024 4:37 PM
Author: Cerebral metal gas station affirmative action



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



Reply Favorite

Date: October 11th, 2024 4:40 PM
Author: bright jew windowlicker

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...id#48188001)



Reply Favorite

Date: October 11th, 2024 4:41 PM
Author: jet-lagged gunner indian lodge

do u know what a sister in law is?

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2...id#48188004)



Reply Favorite

Date: October 11th, 2024 4:44 PM
Author: bonkers church building milk

he's watched too much porn

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2...id#48188017)



Reply Favorite

Date: October 11th, 2024 7:51 PM
Author: bright jew windowlicker

Objection, nonresponsive

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2...id#48188617)



Reply Favorite

Date: December 23rd, 2025 2:44 AM
Author: swashbuckling poppy piazza



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



Reply Favorite

Date: October 11th, 2024 7:50 PM
Author: bright jew windowlicker

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...id#48188616)



Reply Favorite

Date: October 11th, 2024 8:22 PM
Author: Dun soul-stirring native

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...id#48188745)



Reply Favorite

Date: October 11th, 2024 4:42 PM
Author: Bistre Masturbator

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...id#48188009)



Reply Favorite

Date: October 11th, 2024 4:50 PM
Author: burgundy vigorous indirect expression

mostly cr

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2...id#48188040)



Reply Favorite

Date: October 12th, 2024 3:21 PM
Author: Appetizing Foreskin



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



Reply Favorite

Date: December 23rd, 2025 2:58 AM
Author: Adventurous Confused Station

this is exactly why I never sleep with my wife

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2...id#49533050)



Reply Favorite

Date: October 11th, 2024 4:44 PM
Author: bonkers church building milk

depends on if your wife is dead or not

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2...id#48188014)



Reply Favorite

Date: October 11th, 2024 4:44 PM
Author: Bistre Masturbator

i believe this is colloquially known as "the biden rule"

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2...id#48188018)



Reply Favorite

Date: November 30th, 2025 4:48 PM
Author: Aromatic embarrassed to the bone base



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



Reply Favorite

Date: October 11th, 2024 4:48 PM
Author: arousing fiercely-loyal potus tanning salon

only if you don't take pictures to share with us

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2...id#48188026)



Reply Favorite

Date: October 11th, 2024 8:14 PM
Author: Fantasy-prone Pocket Flask Chapel

(martin brodeur)

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2...id#48188717)



Reply Favorite

Date: October 12th, 2024 10:56 AM
Author: Mind-boggling corner

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...id#48189844)



Reply Favorite

Date: October 12th, 2024 11:38 AM
Author: Laughsome liquid oxygen rehab

This. Plus they are always hugging and kissing you.

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2...id#48189951)



Reply Favorite

Date: December 23rd, 2025 6:52 AM
Author: arousing fiercely-loyal potus tanning salon



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



Reply Favorite

Date: October 12th, 2024 3:45 PM
Author: burgundy vigorous indirect expression

Wtf

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



Reply Favorite

Date: October 12th, 2024 5:01 PM
Author: Mind-boggling corner

This is my life. Constant blue balls.

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2...id#48190953)



Reply Favorite

Date: November 30th, 2025 4:44 PM
Author: soggy skinny woman



(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2...id#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...id#49913429)



Reply Favorite

Date: October 12th, 2024 11:41 AM
Author: overrated yapping prole

Is she a spicy Latina?

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2...id#48189956)



Reply Favorite

Date: November 30th, 2025 4:48 PM
Author: Aromatic embarrassed to the bone base



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



Reply Favorite

Date: October 12th, 2024 11:44 AM
Author: Laughsome liquid oxygen rehab

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...id#48189964)



Reply Favorite

Date: October 12th, 2024 3:45 PM
Author: Startled dilemma

180

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



Reply Favorite

Date: October 12th, 2024 11:48 AM
Author: flirting principal's office



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



Reply Favorite

Date: October 12th, 2024 3:17 PM
Author: pearl chest-beating knife private investor

twist: the sil was Catherine of aragorn

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2...id#48190647)



Reply Favorite

Date: October 12th, 2024 3:20 PM
Author: Passionate fluffy fat ankles

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...id#48190659)



Reply Favorite

Date: October 12th, 2024 3:25 PM
Author: flirting principal's office



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



Reply Favorite

Date: October 12th, 2024 3:34 PM
Author: Passionate fluffy fat ankles

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...id#48190707)



Reply Favorite

Date: October 12th, 2024 3:38 PM
Author: flirting principal's office



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



Reply Favorite

Date: October 13th, 2024 12:04 AM
Author: Passionate fluffy fat ankles

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...id#48191875)



Reply Favorite

Date: October 12th, 2024 11:50 AM
Author: walnut spectacular boiling water 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...id#48189984)



Reply Favorite

Date: October 12th, 2024 11:52 AM
Author: 180 haunted graveyard mad-dog skullcap

How many times do we have to go over this.

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2...id#48189992)



Reply Favorite

Date: October 12th, 2024 4:01 PM
Author: electric mediation



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



Reply Favorite

Date: November 30th, 2025 4:48 PM
Author: Aromatic embarrassed to the bone base



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



Reply Favorite

Date: December 23rd, 2025 2:34 AM
Author: electric mediation



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



Reply Favorite

Date: December 23rd, 2025 2:46 AM
Author: swashbuckling poppy piazza



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



Reply Favorite

Date: December 23rd, 2025 6:43 AM
Author: saffron awkward jewess



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



Reply Favorite

Date: October 12th, 2024 11:51 AM
Author: Fragrant turquoise public bath

yes

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



Reply Favorite

Date: October 12th, 2024 4:02 PM
Author: burgundy vigorous indirect expression

voice of reason as always cbtp

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2...id#48190802)



Reply Favorite

Date: October 12th, 2024 11:57 AM
Author: vibrant bbw

not as deranged as brother-in-law

(http://www.autoadmit.com/thread.php?thread_id=5610171&forum_id=2...id#48190004)



Reply Favorite

Date: December 23rd, 2025 7:03 AM
Author: Flickering roast beef

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...id#49533184)