Weeks Before Wedding, Man's Sister Reveals That His Fiancée Stole Her Boyfriend in High School, He Reconsiders the Marriage

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Ely Bulnes • Writer and Editor
Jul 28, 2024 6:00 PM EDT

Hollywood had us believing that high school would be the best time of our lives. Growing up with stuff like Buffy the Vampire Slayer, Gossip Girl, and Lizzy McGuire had us all convinced that high school would be exciting, filled with hot and beautiful people, and brimming with opportunities to find true love on a school trip to Rome. In truth, high school was a very awkward, challenging, and boring time, except for those unfortunate enough to have peaked as a 17 year old. It did have its moments, and surely everyone has a few good memories from those locker-lined hallways, but being overly fond of adolescent memories is not typically a good trait in adults. For most people, the most vivid high school memories serve as fodder for late-night cringe and regrets. In today's story, a woman's terrible teenage decisions resurface when her future sister-in-law spills the beans on some old high school drama. 

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  • 01
    r/AITAH u/Rich Adol 12h AITAH for having second thoughts about marrying my fiancee after I learned about what she did 10 years ago?
    via u/RichAdol
  • 02
    My fiancee and I got engaged last month, and we've been in a relationship for 4 years. I was very excited about marrying her and having her as a life partner until I learned something recently which is making me have second thoughts.
    via u/RichAdol
  • 03
    To provide some more context, my fiancee always seemed a bit nervous around my sister. I asked my fiancee about it, and she just said they were old high school friends. When I asked my sister, she too said the same thing, but she was always a bit cold to my fiancee.
    via u/RichAdol
  • 04
    This carried on the entire time we were dating, and my sister was always somewhat cold to my fiancee. When I told her I proposed and was engaged, she congratulated me but she didn't seem too excited or thrilled for me, which surprised me because we are always each other's biggest supporters and well wishers. But, I did not make too much of it, and was really excited that I was engaged and was going to marry the love of my life.
    via u/RichAdol
  • 05
    However, last week, my sister called me for a serious chat. She said she always wanted to get it off her chest, but that she didn't want to interfere in my relationship but that she felt I had the right to know before marrying my fiancee. She told me she was distant friends with my fiancee in high school, but that friendship was broken after her boyfriend had cheated on her with my fiancee. She said my fiancee knew about their relationship but she still chose to hookup with her boyfriend. I was
    via u/RichAdol
  • 06
    The next day, I asked my fiancee about it, and she fully admitted to it, but she was also in tears. She said that was a horrible mistake she made in high school, and she felt guilty about it, and that she is a completely changed woman, and that experience taught her so much.
    via u/RichAdol
  • 07
    While I do believe my fiancée that she is a changed woman, and that she is not the type to cheat, I am just having second thoughts about everything. I still remember the hurt my sister felt in high school, and to now know that my fiancée was responsible for the hurt, it makes me look at her in a different light. AITAH for having second thoughts about marrying my fiancee? 5,905 2,954 D
    via u/RichAdol
  • 08
    Far_Prior1058 • 12h NTA - we all do stupid stuff in high school we are not proud of. People change over ten years. I would ask her why she did not bring this up. Good luck ← Reply 8.2k
    via u/Far_Prior1058
  • 09
    books-and-horses ⚫ 11h And if she apologized to his sister after the beginning of the relationship ← 3.3k
    via u/books-and-horses
  • 10
    AngryBlackGuyy • 12h i would hope that you arent the same person you were in high school 10 years later. This goes for you and your fiance. People grow. High schoolers are literal children. Reply 598
    via u/AngryBlackGuyy
  • 11
    Kgates1227 • 8h Exactly. My mind is blown how many people here are forgetting his wife was a literal child when this happened 203
    via u/Kgates1227
  • 12
    superancica 2h Also, the guy cheated. She knew he was in a relationship but nobody can make someone cheat. She did his sister a favor. Sister waiting to tell her brother about it till after engagement is ridiculous if they were 4 years together. ... ← 10
    via u/superancica
  • 13
    ImpassionateGods001 • 10h What does distant friends in high school mean? That they saw each other in passing while walking the aile? Took a few classes together? They weren't close, and that was 10 years ago. This is not something to be held over her head. If your sister was so bothered, she should've said something before you proposed. I don't blame the fiancée is not like people go around divulging every mistake they made as teenagers. Reply 145
    via u/ImpassionateGods001
  • 14
    Emotional_Area_1177 • 12h If she had told you about this, it would have been fine. Because she's right, sometimes kids/teenagers do stupid things, and usually grow out of it. But the fact that she kept it from you for 4 years is just not right. So NTA ... ✓ Reply ☑ 924
    via u/Emotional_Area_1177
  • 15
    seditionnow. 9h Four years and after you two decided to get married. Many opportunities before this to own up. Seems she just wanted to brush it under the rug while hoping the sister never spoke up. 158
    via u/seditionnow
  • 16
    InevitableRhubarb232 • 9h She may have just assumed that of course sister already told him and neither of them brought it up so it wasn't a big deal ... 92
    via u/InevitableRhubarb232
  • 17
    countytime69 • 12h Wow, that girl has got to date the brother of the girl she destroyed. What an epic revenge by the sister. Reply û 2.7k ♡
    via u/countytime69
  • 18
    KWS1461 12h You need her to rebuild trust, but would you like to be judged solely on the worst thing you ever did? How much have you grown and changed since high school. Be open and honest about your feelings, but don't jump the gun right away. Reply 391
    via u/KWS1461
  • 19
    sisucas 10h This is crazy? Are you now going to tell her about everything dumb you did in highschool, so she can decide if she wants to marry highschool you? At 27 O didn't even resemble who I was at 17. Our frontal cortex matures during that time and many of us become very different. I have several other problems with your conclusions.
    via u/sisucas
  • 20
    1- Why is your sister mad at her? She should be mad at her old boyfriend, he was the one who betrayed her. Your fiance had no contract or understanding. I seriously don't understand why when a guy cheats, the girlfriend gets mad at the other woman. Your beef is with the boyfriend!
    via u/sisucas
  • 21
    2- Why did your sister want 4 years to tell you? She let you fall in love, make a life together, dream of your combined future and get engaged and then did this? Your sister is awful. She is either jealous of you, your fiance or both. She just dropped a bomb on your life in order to settle a ten year-old score (for something her ex did to her, not your fiance) that didn't help anybody. If thus really is a big deal then your sister is the real bad guy here for letting you dive so deep before she
    via u/sisucas
  • 22
    Choice_Medium7018 • 12h Sister should have spoken up at the beginning of the relationship. How hard is it to say, "Ugh, I hate her, 'Mark' cheated on me with her." She chose to keep it to herself until right before a wedding. It's also kind of childish to try to break up an engagement over something that happened in high school. Sister is the AH here. Reply 193
    via u/Choice_Medium7018
  • 23
    Sherman OneNine87 • 10h As a woman with an older brother I agree. I've never been shy about telling my brother any of the negative points about the women he dated. I would have told him this information when the relationship was new and it wouldn't hurt him. Sister waited 4 years until this news would do the most damage to OPs fiance and then torpedoed the relationship on purpose for revenge. ← ↑ 80
    via u/ShermanOneNine87

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