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Cheating rarely announces itself with a smoking gun. Usually, it comes out quietly: maybe the car stereo is tuned to a station your partner never listens to, maybe they started showing a whole lot more, or perhaps their phone suddenly has a lock code.

At first, you might dismiss these—let's call them—irregularities and give them the benefit of the doubt. But as the little signs pile up, everything eventually clicks, and the truth becomes impossible to ignore.

So, to help each other arrive at the inevitable conclusion quicker, women on Threads have been sharing the small details that ended up giving away their unfaithful man. Here are some of the most eye-opening ones.

#1

A woman with a short haircut looking at her phone with a worried expression, seeing cheating red flags. Used my phone number for target checkout when buying a morning after pill for his side chick in a town we didn't go to.

kerleychristyn , Ivan S Report

DennyS (denzoren)
Community Member
1 month ago Created by potrace 1.15, written by Peter Selinger 2001-2017

D**n, that's a messed up way to find out.

RELATED:
    #2

    A man sleeps in bed with a smartwatch, a cheating red flag hinting at secret activities. He started sleeping with his phone in his pocket and had a lock code, suddenly.

    bit_of_belle , Getty Images Report

    Licensed marriage and family therapist Figs O’Sullivan has worked with couples for over sixteen years. He has sat across from partners who discovered affairs that lasted a weekend and affairs that lasted a decade, and one thing I can tell you with clinical certainty is this: in the vast majority of cases, the betrayed partner suspected something was wrong long before their conscious mind caught up.

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    "The nervous system is not paranoid. It is precise. And when it detects a shift in your primary attachment bond, it does not politely wait for evidence," O'Sullivan says.

    According to the therapist, this is because our nervous system treats our partner as a survival resource. "Your brain is constantly, unconsciously scanning your partner to answer two questions: Are you there for me? and Am I enough for you?"

    #3

    A man looks at a woman's phone, suggesting cheating red flags related to digital secrecy. My phone broke, and I needed to use his to call my dad. You would've thought I was trying to rob him of all his earthly goods.

    elle_trice , RDNE Stock project Report

    #4

    A man showering, a potential small cheating red flag if showering habits change unexpectedly. Suddenly he had to shower every time he came home.

    govantesfj , Sergey Torbik Report

    Doug Moyer
    Community Member
    1 month ago Created by potrace 1.15, written by Peter Selinger 2001-2017

    I mean, he could've showered at the side girl's place to be less suspicious...

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    #5

    A woman vacuuming her floor, potentially a small cheating red flag if chores are suddenly out of routine. I left for 3 weeks and when I came back, the vacuum wasn’t working. I flipped it over and the brush was full of long hair from a wig/weave (I have locs).
    Ended after that.

    jamiffrenchparker , Annushka Ahuja Report

    O'Sullivan says that when both answers feel like "yes," our nervous system stays regulated. We sleep well. Our digestion works. Our mind can focus on work, parenting, and just life in general. But when our nervous system picks up a shift, when something about our partner's emotional availability changes, our body responds with the same intensity it would if we were an infant reaching for a parent who was not there.

    "This is why the earliest signs of cheating are often not behavioral clues you notice in your partner. They are sensations you notice in yourself," he adds. "A tightness in your chest when they pick up their phone. A low-grade nausea that appears when they mention a coworker's name. A vigilance you can't explain, where you find yourself tracking their mood, their schedule, their energy, with an attention that feels obsessive but is actually adaptive."

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    #6

    A man talking to a woman in a car, gesturing with his hand, showing cheating red flags. Stopped at the store to get snacks and drinks. I was about to get out the car he said no babe stay in the car I know what you like oh cool. He comes out with the right snacks but wrong drink. It’s a ORANGE Fanta I HATE orange pop. I said this the wrong pop he looked at me and said you got this pop the other day. Yea, relationship OVER & he admitted he was cheating!

    velts_sweetpea2 , Getty Images Report

    meow point1
    Community Member
    1 month ago Created by potrace 1.15, written by Peter Selinger 2001-2017

    Even if he weren't cheating, you shouldn't stay with a guy who's that inattentive to you.

    #7

    A metal shower drain on white tiled floor, a cheating red flag possibly indicating efforts to hide evidence. Accidentally broke a glass jar in our shower(a hair mask gone unused for 4 years); cleaning it up, glass stuck to it, had to pull the metal top off the drain.... proceeded to pull out 2 feet of long black extension hair! (I have naturally curly blonde hair!)

    katrinapbx2 , Ksenia Chernaya Report

    Inservio Smurf
    Community Member
    1 month ago Created by potrace 1.15, written by Peter Selinger 2001-2017

    Check the television. I hear dark haired girls in white, step out of those SOAKING wet on some nights!

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    #8

    A woman knocking on a wooden door, potentially related to small cheating red flags. He was supposed to come out of town with me, but he said he had been called into work and he couldn’t go. I told him I would reschedule for a weekend he could come, and he said, “no babe you go ahead and go.” I told him I could save the money and go another time and he said, a little too quickly and frantically, “I’ll give you the money.” So, on my way out of town something told me to pull up. Knocked on his door and a woman’s voice said “who is it?”

    ms_lolarenee , Mehmet Turgut Kirkgoz Report

    #9

    Changing the way he dresses out of no where. Sudden interest in hygiene he didnt have before. Working out when he didnt ever. Hiding the phone screen. Smiling or laughing at his phone when he checks a text. Phone on silent. Suddenly starts going out with the guys, which he'd never done before. It's so obvious- they think we're stupid.

    icanbsassy Report

    Amanda Reinstatler
    Community Member
    3 weeks ago Created by potrace 1.15, written by Peter Selinger 2001-2017

    Yes they do, no matter how much proof to the contrary we give them....but that is how you get the upper hand my dear ;)

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    So if there's a common denominator that these — and other signs of cheating — share, it's emotional withdrawal disguised as calm, O'Sullivan says.

    "One of the most common patterns I see is a partner who suddenly seems... fine. Suspiciously fine. Where there used to be conflict, there is now pleasant neutrality. Where there used to be complaints about the relationship, there is silence," the therapist explains.

    "This often gets misread as improvement. 'Things have been so much better between us lately,' the betrayed partner will say. But what's actually happening is that the unfaithful partner has stopped investing emotional energy in the primary relationship because they're investing it somewhere else."

    #10

    A hand in a red jacket adjusting the car radio, a small cheating red flag in relationships. Suddenly found the car stereo with country music on it.
    I was not wrong at all.

    silkesaint , Gustavo Fring Report

    Inservio Smurf
    Community Member
    1 month ago Created by potrace 1.15, written by Peter Selinger 2001-2017

    Some people are fans of country, but very few are casually so. A bit like opera or thash metal in that regard : you either love it or hate it.

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    #11

    A woman looking at her phone with a worried expression, revealing small cheating red flags. Suddenly changed his phone background from a picture of us to something else.

    mikkyla , Liza Summer Report

    Inservio Smurf
    Community Member
    1 month ago (edited) Created by potrace 1.15, written by Peter Selinger 2001-2017

    Oops... I did this once. In my defense, it was to a picture of a VERY dirty delivery van, where someone had scribbled in the grime: "SINGLE WHITE VAN SEEKING SINGLE YELLOW SPONGE FOR DIRTY WEEKEND FUN" it had me grining every time I unlocked my phone

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    #12

    A man shaves, indicating self-grooming that could be a cheating red flag. Suddenly, and very temporarily, got BEYOND EXTRA into hygiene and skincare them he ever was before.

    tyhlir , cottonbro studio Report

    #13

    He was reading a news story from his phone out loud about my ex. I said, “let me see”. When he gave me his phone, I started scrolling thru it, he freaked out and started yelling to give me his phone back. Funny thing is I only pretended to go thru his phone and his reaction gave me all the evidence I needed.

    dana.edmo Report

    Amanda Reinstatler
    Community Member
    3 weeks ago Created by potrace 1.15, written by Peter Selinger 2001-2017

    Like asking the suspect to take a polygraph....the reaction is more telling than the test results....

    #14

    A man doing push-ups, potentially a sign of increased self-care as a cheating red flag. He started working out and finally went to the dentist.

    kiki_414 , Kampus Production Report

    Annika Kremer
    Community Member
    Premium
    3 weeks ago Created by potrace 1.15, written by Peter Selinger 2001-2017

    Tbf, this might be caused by a number of things - a talking-to by a doctor, midlife crisis, or just plain realising you want to be fitter. I don't doubt OP's words that it was due to cheating in this case, but it's not a universal red flag.

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    #15

    A woman with her back to a man who is shrugging, revealing cheating red flags. Swearing he told/mentioned things to me when he didn’t.

    mzsummercloud , Vera Arsic Report

    Inservio Smurf
    Community Member
    1 month ago Created by potrace 1.15, written by Peter Selinger 2001-2017

    Human memory is neither flawlessly complete, nor flawlessly accurate -- that is why eidetic memory is regarded with such wonder and amazement. Holding neurotypicals to the same standard of memory retention you would demand of a USB stick, is a red flag for power asymmetry in the relationship, which could become a problem.

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    #16

    A woman in a car looking suspiciously at a man, noticing cheating red flags. Perfume smell in his car, he didn’t know i was going to hop in and run to the store that day. still denies it to this day. i’ll never doubt my own nose lol

    missfloridafitness , cottonbro studio Report

    #17

    A sad woman in bed, holding a pillow, possibly feeling the impact of cheating red flags. When he worked nights he’d always come in and kiss my forehead when he got off work. One night he came in and walked straight into the living room. I knew then.

    indiaidalisw , Ron Lach Report

    Serial pacifist
    Community Member
    1 month ago Created by potrace 1.15, written by Peter Selinger 2001-2017

    I don’t doubt the truthfulness of him cheating, but he once didn’t kiss you and you knew right away that he was cheating?!

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    #18

    A couple in bathrobes having a heated discussion, highlighting potential cheating red flags in their relationship. Found a random toothbrush in his bathroom. He tried to convince me it was mine. I was honestly more mad he thought I was dumb enough to not know my own toothbrush.

    vfish24 , Diva Plavalaguna Report

    Amanda Reinstatler
    Community Member
    3 weeks ago Created by potrace 1.15, written by Peter Selinger 2001-2017

    They all think they are really good at gaslighting for some reason....set them straight!!!

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    #19

    A woman looking suspiciously at her phone, revealing small cheating red flags. He sent the wrong emoji during a text conversation. Later I put together that he'd been texting her at the same time and that emoji was meant for their conversation. But when he sent it to me, it felt weird enough that my antennae started feeling the air.

    thejoje , Mizuno K Report

    sweetpea
    Community Member
    1 month ago Created by potrace 1.15, written by Peter Selinger 2001-2017

    I picture a perched butterfly who's antennae are scanning the scorned air

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    #20

    A couple arguing in bathrobes, showing small cheating red flags. He started accusing me of cheating. I had the opportunity to look through that phone and seen he was telling girls hella stuff and meeting up with gay guys for drinks.

    _tayeler , Diva Plavalaguna Report

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    #21

    Found a picture in his phone of our cat sitting next to a pair of sandals in our living room.. they weren’t my sandals.

    mopualani Report

    #22

    Our intimacy rhythm was off. As in, our movements were suddenly out of sync, and he was doing things in a way that didn't work on my body. Like he had been "dancing" with someone else.

    cratereyes Report

    Annie Persson
    Community Member
    1 month ago Created by potrace 1.15, written by Peter Selinger 2001-2017

    Okay, point to the guy for taking hints! Minus lots of points for learning from others .. 😅

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    #23

    A woman looking at her phone with a concerned expression, identifying cheating red flags. Instagram started showing me her profile in the People You May Know section.

    idigplantsss , Anna Tarazevich Report

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    #24

    A white USB charger and cable, a cheating red flag suggesting hidden device usage. He had an iPhone charger in his car. He had an android.

    ashxoxo_ , Arturo Añez. Report

    #25

    A woman looking suspiciously at her phone, possibly noticing cheating red flags in a relationship. Put his phone on airplane mode before bed to charge “faster”. BEFORE BED! TO CHARGE OVERNIGHT! You need speed for an overnight charge? I would take if off airplane mode in the middle of the night. Lo and behold all the text messages from nicknames.

    keyabobeya , Craig Adderley Report

    #26

    A car dashboard with warning lights, highlighting small cheating red flags or signs of neglect. Said he was late getting to my house because he needed an oil change, drove his car the next day, the oil light was on.

    greenqueenb55 , Erik Mclean Report

    Doug Moyer
    Community Member
    1 month ago (edited) Created by potrace 1.15, written by Peter Selinger 2001-2017

    He was telling the truth - he did need an oil change. He didn't say that he got one, just that he needed one...

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    #27

    He did a full wardrobe and personality overhaul out of the blue. He hit the gym, got tattoos, changed his clothes and everything about him…
    His work partner was pregnant at the same time I was. The exception was that *she* wasn’t pushed down 2 flights of stairs for confronting him.

    ris.thomp Report

    #28

    He connected his phone to my cars Bluetooth. I went to move my car one morning and his phone connected from inside the house. Caught the good morning text coming in.

    tieshthegreat Report

    #29

    A woman distraught, holding tissues to her face, revealing small cheating red flags. My mom always said my dad always talked about his colleague and suddenly stopped talking about her altogether the day he started cheating. She was right.

    paulivollrath , www.kaboompics.com Report

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    #30

    A woman crying with tears, showing the emotional impact of discovering cheating red flags. He was arrested for a DUI while i was with him, gave me his belongings except his phone. he didn’t realize he did hand me a receipt that was in his pocket, for a ceramic rose. he didn’t give me any lil rose. led me to check his phone when he got out and he was talking to so many girls it’s actually insane. after 6 years of being with him.

    lovergirl.ever , Alex Green Report

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    #31

    He opened his iPad and I saw hundreds of pictures of different women, all types of colors, shapes and sizes. I said wth. He said your pictures are here too.
    That was the last day he laid eyes on me.

    mika.nicole22 Report

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    #32

    Hair tie on the nightstand. I’m very particular about the hair ties I like and it wasn’t that one.

    tarynldn Report

    #33

    I told him my coworkers and I were going to a steak place for dinner while on a business trip. He asked me what I would eat as a vegetarian? I’ve never been a vegetarian and regularly cooked meat for both of us.

    laverdia Report

    #34

    Came home from ‘work’ freshly showered.

    wfactor Report

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    #35

    A woman stands behind a man engrossed in his phone, showing cheating red flags of emotional distance. Started keeping his phone face down.

    leannmichelle_w , cottonbro studio Report

    Top Notcher
    Community Member
    1 month ago Created by potrace 1.15, written by Peter Selinger 2001-2017

    I keep my phone face down all the time since I don't want to be bothered by notifications. But if someone suddenly started doing it, it would be suspicious.

    #36

    One of my exes from forever ago bought be a bunch of my favorite chocolate candy. I had never eaten that in front of him and I hated that chocolate.

    claireash728 Report

    #37

    Wasn’t happy when I surprised him with showing up somewhere to see him. He looked super duper shocked. Talked talking and we just walked in silence until we were a ways away from everyone. Why was he shocked? Why didn’t he come up and hug/kiss me? Yeah I just KNEW! His sister than asked me how long we been together and that was enough when I told her and her face looked like, “ooop.”

    missyxrockets Report

    Amanda Reinstatler
    Community Member
    3 weeks ago Created by potrace 1.15, written by Peter Selinger 2001-2017

    I honestly love that you kinda humliated him at work : )

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    #38

    A man and woman arguing, with the woman pushing him away, illustrating cheating red flags. I found a headband in his car one day - he was OBSESSED with how clean it had to be at all times. Tried to claim it was mine. I’ve never once worn a headband like that.

    stamacey , Keira Burton Report

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    #39

    Told me he was going on a guys’ trip to New Orleans but left receipts laying around for dinners for 2 in Charleston that same weekend.

    gvlrunnermama Report

    Amanda Reinstatler
    Community Member
    3 weeks ago Created by potrace 1.15, written by Peter Selinger 2001-2017

    Honestly the gaslighting, stupid dumba$$ excuses and things they expect us to believe are almost worse than wh0000ring around they way they like to do

    #40

    A woman on the phone looking concerned, a small cheating red flag indicating secret conversations. He went to pick up dinner and asked if I wanted all flats.
    I ain’t never ordered all flats.

    drmddc , Wundef Media Report

    Mimi M
    Community Member
    1 month ago Created by potrace 1.15, written by Peter Selinger 2001-2017

    Flats = middle section of chicken wings.

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    #41

    He'd get distant right after an amazing week or weekend together (we were long distance but worked together and saw each other several times a month).
    I went on Are We Dating the Same Guy in his city and he was very easy to find.

    emilycaitlan Report

    HangryHangryHippo
    Community Member
    1 month ago Created by potrace 1.15, written by Peter Selinger 2001-2017

    Don't understand this. Long distance but worked together?

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    #42

    Suddenly needed to text his college age sons goodnight every night before sleep when he never did before.

    lilyb562 Report

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    #43

    1) he said he spilled gas on his clothes and had to throw his clothes in the washer. Laundry room didn’t smell like gas.
    2) said he had to work overtime and went in at 4am-when he came home and hugged me that evening the first thing I said was “your beard doesn’t smell like the factory today….that’s odd
    3) whenever I asked who he was constantly texting he said it was his best friend. So I started texting his best friend at the same time. He was never texting him.

    leahcriz Report

    Amanda Reinstatler
    Community Member
    3 weeks ago Created by potrace 1.15, written by Peter Selinger 2001-2017

    Just for now - Let them think you bought it.....

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    #44

    Started getting meaner.

    jennesseyy Report

    #45

    A woman with her eyes closed in a car, possibly stressed due to relationship issues or cheating red flags. My phone no longer automatically connected to his car…months later when we were separated, I was in his car to go to an appointment for our child and there was another woman’s name listed as a device the car remembered. The little things I tell you…

    yuliscandalo , Ali Mkumbwa Report

    #46

    I never used TikTok much, but here's what I learned: it notifies you when someone repeatedly views your profile. If your wife has access to your email, she might start wondering why the same random local woman keeps checking her husband's account in a state you just moved to and don't know anyone in. A little research later, she discovers he's already met someone at his new job and has been hiding an affair. Thanks, TikTok?

    amcamille Report

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    #47

    Taking long in the bathroom, sleeping on the couch, shaving everywhere including his legs. Phone was always extra clean but at first he didn’t know that recently deleted messages could be recovered.

    mamamiyaxo Report

    #48

    So many things but when he’d tell me the end of a story (I wasn’t the one he told the beginning to).

    raeraecain Report

    #49

    Left the hotel map in the front seat.

    klsbryant Report

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    #50

    His apartment was too clean and his bed was made. Also he would get a text every morning when he would get up. It was definitely a good morning text. He said it was someone from work asking a questions and i was like….”every day at 7:30am they can’t wait until you get in?”

    shesavvitch Report

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    #51

    i have sooo many examples but one, we moved to new city and out of no where he had a cousin in that city he was seeing every single day. we moved back to our hometown and apparently right after, that same exact cousin decided to drop everything & move back to our hometown as well.

    c.loud999 Report

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    #52

    I told him he needed to set some better boundaries with her (they were friends) and he didn’t argue for once. At the time we were arguing about something else so I didn’t process it, but a flag went up in my brain. When I found out later that he cheated I IMMEDIATELY remembered that, and knew it had already happened before that conversation.

    jilldevolauthor Report

    #53

    Randomly started saying how he looks like Brent Faiyaz. I knew only a woman could be hyping him up like that cause WHERE lmao.

    continentofasiah Report

    #54

    He got mean and didn’t kiss me when he came home from work as much and affection was a big thing for us in the beginning.

    zchanielle_913 Report

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    #55

    He stopped calling on his lunch breaks , when before he would call every night. I pulled up to his job one day and saw him outside conversating with a girl and he eventually admitted it.

    sumnaboutshy Report

    #56

    Stopped wanting to walk the dog with me or run any kind of small errand with me.

    trace618 Report

    #57

    1. He got a speeding ticket in a city that he never needed to be in
    2. Checked his voicemail (back when texting wasn’t a big thing)
    3. He went to Vegas and didn’t answer his phone
    4. Changed phone passcode

    xomiajay Report

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    #58

    He didn’t bring me a cupcake from a bakery he visited.
    It was a hundred little things I noticed till I had proof that he couldn’t deny.

    melodictunes Report

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    #59

    He started calling me “lil one” when I’ve never been small.

    reignlikesteph Report

    #60

    “Are you mad” when he finally turned his phone back on after not going back home until the next AFTERNOON. Then getting mad at me talking about “wow I didn’t drive home drunk & you mad?” King of deflection. I am happily divorced.

    driaagone Report

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    #61

    He actually did nothing. Pure intuition. Til this day scares me how I just will know certain things.

    ambre_luv Report

    DennyS (denzoren)
    Community Member
    1 month ago Created by potrace 1.15, written by Peter Selinger 2001-2017

    I think there were probably signs, even if it were small changes, that someone who spends everyday with the person would pick up on, even if it just feels off.

    #62

    Suddenly started complaining about my body glitter getting on him and in his car.

    xo_greenteavibe Report

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    #63

    A couple sits apart on a couch, the man on his phone, highlighting cheating red flags of disconnection. His YouTube started having the rain sound videos.

    mahogany_barbie , cottonbro studio Report

    #64

    A woman arguing with a man, discussing cheating red flags in their relationship. He had a single piece of glitter on his cheek.

    muffy.seven , Timur Weber Report

    Bertha Madott
    Community Member
    Premium
    1 month ago Created by potrace 1.15, written by Peter Selinger 2001-2017

    funny non-cheating story. I do a lot of paper crafts and sometimes they involve glitter or sequins. I had glitter somewhere (clothes body or both) but didn’t notice. Went to bed as usual and eventually DH joined me. Next morning he had glitter on his body somewhere. I screamed with laughter. DH M88 retired heavy equipment operator, macho Italian guy, but old. He did NOT think glitter was funny. I do (F77). Snort

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    #65

    BYE I got a text receipt (bc my number was linked to his card) from a donut shop that showed 3 donuts were bought instead of his usual 2. Confrontation immediately.

    spookyflavored Report