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Article created by: Rasa Žilinskaitė
Our siblings are our first friends on this planet, and if we’re lucky, they can be our closest and most long-lasting relationships too. But unfortunately, sometimes our friends betray us, and the sting of a knife in the back can hurt much more when it's coming from a brother or sister. 

One curious Reddit user asked others, “What was the most [messed] up [thing] your sibling did that you can’t forgive them for?” And many readers have responded with unthinkable stories. Below, you'll find some of the most egregious familial offenses, as well as an interview with family and sibling therapist Dr. Karen Gail Lewis.

Don’t forget to upvote all of the betrayals that you wouldn’t wish upon your worst enemies (let alone your siblings!), and if you're reminded of you how lucky you are to have brothers and sisters who love you, now might be the perfect time to tell them how much they mean to you.

#1

Pregnant woman gently holding her belly, reflecting on emotional sibling experiences that are hard to forgive. My wife and I had been trying for years to have kids. Meanwhile, my Sister was Fertile Myrtle popping the first 2 out without even trying. My wife and I conceived twins, and we were so excited. We told the family the names were were going to use, etc. We ended up losing them. My sister doctor shopped around until she found someone that would diagnose her with Infertility and got prescribed drugs that would make it significantly more likely to have twins. She used the names we had planned to use. It took well over 10 years before we spoke again

RoboNinjaPirate , Anastasiia Chepinska Report

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    #2

    Young woman wrapped in a blanket sitting alone and upset, reflecting on awful things siblings did she will never forgive. My brother locked me out of the house when there was a tornado warning. There was blasting wind, rain, and hail, and the sirens were going. I had a full-blown panic attack. He later laughed at me and mocked me. Our parents came down on him like a ton of bricks and majorly punished him, but it didn't really work. This was just one of the many horrible things he did to me. He hated me from the day I was born because he didn't want a sibling. Our parents would punish him but like I said, it only made him worse. Thankfully, karma finally got him. He wrapped his car around a streetlight two weeks ago. He can rot in the ground now for all I care. I may make a post about this in AITA later on. EDIT: Yes, he died.

    Fetivers , RODNAE Productions Report

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    #3

    Person holding cash with twenty and fifty dollar bills, representing stories of awful things siblings did. As my grandmother lay unwell in her bed, from what would later turn out to be the first stages of kidney and liver failure... He stole every single bit of cash in her handbag, over £900 we think. She died in a delirium, screaming about how one of her grandchildren stole from her. My mother thought it was the toxins in her body. When my parents found out they did nothing and let him keep the items he bought. This is the not the worst thing he has done in his lifetime. I will never forget and I will never forgive.

    Bamboo_Steamer , Karolina Grabowska Report

    #4

    Person in striped shirt talking on phone and writing notes beside a laptop, illustrating sibling stories and forgiveness themes. My sister phoned every new employer I had over the years and said bad stuff about me. She would invite me over to diner to find out who my boss was. Then weeks later she would invite me over and ask how it's going at work.

    Volta001 , Karolina Grabowska Report

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    #5

    Person in casual clothes sitting on a couch holding their stomach, illustrating sibling conflicts and awful things shared. Call me fat as an insult in our arguments for years. Said it so much I always believed I was fat... now that I am fat and look on all my pictures of my skinny years, I hate that mo fo. He ruined my confidence even though my body was perfect

    Extremelyhotchick , Towfiqu barbhuiya Report

    #6

    Silver motorcycle parked on a roadside under a cloudy sky, illustrating sibling stories about awful things they did. I bought a motorcycle. Before I bought it I had a lengthy discussion with my wife of in case of accident what quality of life of be willing to live with. We talked and she knew my mind. I did have a catastrophic accident. I was in a coma for 42 days. I died 3 times. Talk came about what my quality of life would be afterwards and pulling the plug. My siblings wanted me to live at all cost no matter my wishes. They tried to take my wife's medical rights away. I have a good life, my wife made the right choices but asked me not to subject her to my family anymore. I went no contact.

    Dendad1218 , Pixabay Report

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    #7

    Pawn shop at night with signage, illustrating stories people share about awful sibling actions they will never forgive. My older brother once stole a bunch of my stuff to sell to a pawnshop to pay for drugs. He apologized to our parents for breaking their trust. To this day, he still refuses to apologize to me, because in his messed up logic, it was only our parents trust that was violated. This was over 10 years ago.

    Diablix , Acton Crawford Report

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    #8

    Young woman covering her face with hands as siblings argue in the background, showing conflict and awful things siblings did. Outed me in front of my homophobic family.

    Lynx12321 , cottonbro studio Report

    #9

    Dog sitting in the driver’s seat of a parked car, visible through the window on a city street. My brother planted drugs in my car - packaged for sale, 5 year mandatory prison sentence - and called the police saying there was a dog locked in a car in front of his house with no water or open windows. Luckily I pulled up at the same time as the cops & showed them my dog was fine, the sunroof was open & he had full bowls of food and water.

    hendermom , Maria Orlova Report

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    #10

    Young child in white shirt crying with tears streaming down face, illustrating sibling conflicts people never forgive. My younger brother, being the favourite child, would often tell my mum that I abused him when she was at work just to show me he had POWER over me. I would get hit for no reason on a daily basis. I gave him a left hook once for a seperate argument. Best gift I ever gave anyone.

    chineseapp1e888 , Anna Shvets Report

    #11

    Two siblings walking with arms around each other inside an indoor space, highlighting sibling relationships and forgiveness. My brother told me I would be allowed to see my niece, under his supervision, until she was old enough to "know what you are", at which point he would decide what, if any, involvement I would have in her life. I'm gay and now have two nieces, the elder of which I haven't seen in nearly 5 years and the younger I've never met. Even overheard a conversation while on the phone with another family member during the holidays, that the elder niece doesn't even know she has an uncle.

    ThornBjartskular , Lightitup_now Report

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    #12

    I was 18, she was 14. I was extremely ill- doped up on the daily and bedridden from what turned out to be a slowly dying organ and some undiagnosed digestive conditions. I was in a complete haze for over a year from pain and meds. I technically wasnt allowed to stand by myself or feed myself without help. I didn't get the assistance I needed at home, and hurt myself pretty often just trying to take care of myself, but thats a different story. Point is that I was incredibly weak, underweight, enotionally fragile, and drugged to the teeth. My sister decided she was jealous of the little attention I was getting and decided to deprive me of sleep as much as she could. Punching me awake, threatening the few things I had that kept me feeling sane, pouring paint on and ripping my things, and then gaslighting me into believing it was all drug dreams and stuff I did myself while high. No one in my family believed me when I complained, and helped my sister gaslight me into believing even if she was hurting me, she was sleepwalking and it wasn't her fault. It only stopped after my then boyfriend heard her screaming at me from the couch downstairs where he was napping and threatened to move me out. I was moved into a different room and allowed a lock on my door as of the next day. The whole family is dysfunctional. I don't talk to any of them anymore.

    anon Report

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    #13

    Person decorating a scrapbook with stickers and craft supplies, related to siblings and unforgettable actions. Broke in my diary, took pictures of it and sent it to my crush. Its been 3 years, i still cant look my crush in the eye

    Then-Background-2762 , cottonbro studio Report

    #14

    Pile of gold and silver jewelry tangled together with various banknotes on a brown fabric background, symbolizing sibling betrayal. Two weeks after mom died my sister broke into the house to get her jewellery and money. I was home and changed the locks. She tried her key and when it did not work she came into the back yard and through the sliding glass door. My back was to the door when I heard it open.

    Nails_jello_2_a_tree , Mehaniq41 Report

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    #15

    Young people playing beer pong indoors with red cups, illustrating sibling conflicts and unforgettable moments shared. Threw a party at our house while the rest of the family had gone to a funeral out of state. Many people there were kids my age/classmates who went in my room (which was bad enough in my eyes) and stole things. I’ve never felt so violated.

    MarginSally , Jonah Brown Report

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    #16

    Couple holding hands in wedding attire, symbolizing relationships and conflicts siblings say they will never forgive. My brother got married in Vegas. Our small family isn't the nicest and he was afraid my mom or her husband would make a scene. Nobody was invited. I was completely fine with it. In fact, kind of wanted to do that myself. Then years later, it's my wedding. What does he do? He made a scene. Tried to fight my husband right after our first dance in front of everyone. Still love my brother, but man... that hurt.

    michonne_impossible , Jeremy Wong Report

    #17

    Hands of a person gently holding the stomach of another individual symbolizing sibling relationships and trust. When I confided in my older sister that my husband and I had been trying for a baby unsuccessfully for over a year, she sarcastically said yeah I would like to see you with a baby. Was probably the worst thing anyone has ever said to me.

    pink_hydrangea , John Looy Report

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    #18

    Person holding a phone and a credit card, illustrating common awful things siblings did that cause unforgiveness. Raid my bank account while i wasn't home under the motto of "Sharing is caring."

    TheDutchfella2001 , Anete Lusina Report

    #19

    Retro gaming console with tangled cords and two controllers, illustrating sibling conflicts and unforgettable actions. My sister was sick of sharing the television with my brother and me, and so she had her friends steal our Sega Genesis we had just got for Christmas a few months before.

    marry_me_sarah_palin , Alex Gagareen Report