AITA for being upset that my sister didn’t tell me that she got married?

What happens when a sister’s secret marriage sparks hurt feelings? A 26-year-old woman discovered her older sister eloped months ago, sharing the news only with their father. Her shock and questions led to a sharp comparison to their toxic mother, deepening the rift.

This story explores trust, communication, and family bonds. Social media users debated whether her upset was justified or an overreaction. It examines navigating sibling relationships and healing from unexpected exclusions.

‘AITA for being upset that my sister didn’t tell me that she got married?’

The story begins with a surprising revelation at a family gathering.

I (26F) found out my sister (33F) got married a few months ago and never told me. Yesterday we were at our dad’s house for Father’s Day when her fiancé...

I was confused and said “Wait, did you already get married?” and my sister said yes, that they drove to a neighboring state and eloped by themselves. I asked why...

The news led to a heated exchange.

My brain still couldn’t process that my own sister eloped and I was the last to know. I said “how could you do that and not even think to tell...

For context, I have been no contact with our mother for 3-4 years for a variety reasons but she is a very manipulative, narcissistic person.

I didn’t think I did anything near what our mom would have done but I believe she said this to end the conversation and intentionally make me angry (which of...

The sister’s secrecy felt like a betrayal given their closeness.

I hated to find out about her marriage that way and I have no clue when I would have found out otherwise. I’m not upset that I wasn’t invited to...

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I’m upset that I didn’t find out until months after the fact. My sister and I endured our parent’s divorce at a young age, I was the first to know...

and I was entrusted with a secret gastric bypass surgery she had and wanted to keep from our dad and stepmom. I can’t comprehend why I would be entrusted with...

She grappled with confusion and hurt over the exclusion.

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I’m not aware of anything that has changed between us and I don’t know how to proceed with my only sibling not trusting me with life events. I have never...

This is her second marriage so my dad suggested maybe she feels some sort of guilt or shame (my father and sister have both been divorced once so those were...

If she felt that I would think she would keep the engagement a secret as well. I’m so torn between “it’s her business” and “she’s my SISTER and we tell...

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ETA: I am apparently the last to know in her inner circle/immediate family. My dad didn’t tell me because he thought I already knew. He also has no clue why...

The woman’s hurt over her sister’s secret elopement is understandable, given their history of sharing major life events. The sister’s decision to withhold the news, followed by a harsh comparison to their manipulative mother, suggests defensiveness or unresolved issues. The younger sister’s reaction, though emotional, was not excessive—she sought clarity, not drama.

The older sister’s secrecy may stem from personal reasons, like shame over a second marriage, as their father suggested, or a desire for privacy. However, her dismissive response escalated the conflict, undermining their close bond. Both sisters need to address underlying tensions to rebuild trust.

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Dr. John Gottman, a relationship expert, notes, “Empathy and open communication are vital for resolving family conflicts.” (The Seven Principles for Making Marriage Work, 1999) This applies here—honest dialogue could clarify intentions.

The younger sister should approach her sister calmly, expressing her hurt without accusation. Asking about the secrecy’s reasons, like guilt or stress, may foster understanding. Family counseling could help them navigate past trauma and strengthen their bond, ensuring mutual respect moving forward.

Let’s dive into the reactions from Reddit:

Reddit users offered diverse perspectives on the woman’s hurt and her sister’s actions.

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Many validated her emotional response.

isthishowweadult − NTA but realize your sister already went low contact with this move. Respect that. Put your energy and time into other people.

CarpenterRadio − I think being upset is valid. And insofar as I can gather, OP, you didn't make a scene, you weren't so hurt that you started yelling or crying,...

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I'm curious as to why she didn't just say sorry. Like, pulling out the Mom thing seems SO unnecessary and inaccurate. Like, has she ever accepted any responsibility for how...

Why wouldn't she apologize? Do you think she felt like you'd actually accept it or that it would be a whole "thing? "

Only thing I can think is she doesn't want to tell you the reason she didn't tell you and decided to use the Mom thing to just turn the spotlight...

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tonidh69 − You deserved at least a heads up. I guess if they were trying to keep it a secret i could understand. But then didn't tell you till months...

Glen_c0co − That’s weird and also hurtful that she would just not tell you especially if you guys have always been close and tell each other everything.

I know you said nothing has changed between you two but if you still value the relationship you might want to ask her personally one on one what’s going on...

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She should have spoken up about that if that’s the case, but she didn’t. I would do that as one last attempt to mend things so you can at least...

Some saw both sides but criticized the sister’s approach.

mybeating_heartbeat − You’re not the a__hole for feeling the way you do. I think based on how things have always, your expectation wasn’t unwarranted.

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Yet, she’s also not an a__hole for not telling you. I find it personally weird, considering how you describe your relationship up until then but she’s a grown woman and...

What I DO believe is that she acted like an a__hole when she made that comment comparing you to your mother. Especially because she knows the trauma you’ve both endured...

kindly-shut-up − Well that was extremely rude on her part, and I say this as someone whose sister also eloped. I was disappointed I couldn't be there to witness it,...

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She just explained why she'd done it and showed me pictures. And I was happy for her. Your sister is. ..strange lol.

Radiant-Idea-2261 − NTA I feel like your sister owes you an explanation for excluding you and an apology for being n__ty with the mum comment.

Getting married doesn’t give you a free pass to be an arse. Maybe speak to her when things have settled a bit and tell her you were hurt as to...

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Others suggested a shift in family dynamics.

[Reddit User] − NTA really strange omission and really low blow to compare you to your mom. I have to ask, you’ve been her confidant, has she been there for...

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Cali_Holly − I have an older sister by 3 years. I thought as we got older that we were closer than we were. I didn’t quite put it together until...

But then again, I tend to put up with a lot from people before realizing just how toxic & awful they were. Low confidence & self esteem stemming from childhood...

When I became an adult, I never stood a chance. But honestly, that’s what it sounds like. OP believes they are closer than they are & maybe sister feels that...

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OP should just do the same, not as retaliation, but just matching her sister’s same energy. After all, there is no point in sharing one’s life with another person who...

Cherrybomb909 − NTA op your sister sounds incredibly narcissistic. Try gray rocking her, don't react to her and don't tell her information. How your sister reacts will show you the...

This story underscores the pain of unexpected exclusion in close sibling relationships. The younger sister’s hurt is valid, but her sister’s defensiveness highlights a need for better communication. Open dialogue and empathy can heal family rifts and rebuild trust.

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How would you handle a sibling keeping a major life event secret? What’s the best way to rebuild trust after a hurtful family argument?

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