AITA for telling my sister my feelings about her have not changed after she confronted me for telling her fiance the truth?

Seven years ago, the original poster (OP) discovered that her sister was having an affair with her then-husband. The OP caught them together while they were still married and subsequently ended both relationships, divorcing her husband and completely cutting her sister out of her life. The sister and the ex-husband continued their relationship for a few years and had a child together.

Despite the sister attempting to reconcile five times, the OP repeatedly refused, expressing deep unforgiveness and even wishing ill upon her sister regarding her relationship with the ex-husband. The OP maintained strict no-contact, even refusing to meet the sister’s child. Recently, the sister’s fiancé confronted the OP for not meeting him, leading to a direct confrontation where the sister demanded reconciliation, prompting the OP to state clearly that her feelings had not changed and she would not care if her sister died. This stance has caused conflict with her parents and aunt, leading the OP to question if her actions were too harsh.

AITA for telling my sister my feelings about her have not changed after she confronted me for telling her fiance the truth?

Seven years ago my sister had an affair with my (ex)husband. We were still married at the time, I believed happily, and she was his mistress. I caught them together and banished both of them from my life.

I divorced him. I told her to get away from me and the two of them stayed together for a couple of years and had a child.

My sister tried to reconcile with me 5 different times. I rejected her and told her I would never forgive her for what she did and I did call her some names and wish for some bad things to happen to her ie I wished for him to cheat on her and to destroy her life like they did mine and I told her she’d deserve it all and not to cry to me if she caught anything off of him.

I actually did a full STD/STI panel after finding out he’d been cheating on me with her. I was negative but you can never be too careful and he never denied there being more.

I have been 100% no contact with my sister since and I never met her child. Not even when ex cheated while she was pregnant and she ended up homeless. I told our family members I would not accept being around her.

A couple of weeks ago this guy reached out to me. He’s engaged to my sister and was mad I wasn’t there to meet him at the dinner my parents hosted to meet him for the first time. He said my sister was so upset, etc.

That she had wanted me to forgive her, etc. That he felt I was shitty to be mad at her dating an ex of mine. I corrected him and said she was his mistress, that I was married to him, still actively married when they had an affair and I told him I caught them in my home and my bed.

He didn’t reply.

Several days afterward my sister showed up and was pissed off at me for telling him what I did because he left her. She told me I should be willing to put the past behind us and reconcile and to stop treating her like she’s a criminal or evil.

She said I act like she repulses me. I told her because she does. And I told her my feelings had not changed at all in 7 years. She cried and told me one of us could die and we’d never reconcile if I’m not willing to try and I said I would not care.

I told her she could die tomorrow and I would not regret my decision not to reconcile. I told her I no longer cared what happened to her or if she was okay or not. She left in tears.

My parents were so angry she confronted me. They had already been disgusted with her being the other woman but to confront me for correcting her lie, they said it showed she had not grown at all.

While my aunt told me I had no need to be so cruel after time had passed. She told me I’m treating my sister worse than she treated me and that I should be ashamed of myself for saying I wouldn’t care if she died because it’s an evil thing to say to anyone let alone family.

AITA?

Here’s how people reacted:

Kmia55

Tell your aunt for the most part affairs aren’t spontaneous events. Your ex and your sister at some point made a decision that they were going to be together knowing it would break up your marriage and hurt you tremendously. They didn’t care. They did it anyway. They knew that at some point in their flirting with each other exactly where it was headed and chose to do it anyway. And you’re right, that is evil. The worst part is women who have affairs with married men do it because they think they are “special.” Well, your sister found out that she wasn’t. Your sister is the cruel one. You are not treating her worse than she treated you. You are not torturing her with intent like she did to you. You are simply responding in a healthy way to betrayal by not wanting anything to do with her.

Your aunt needs to know that decisions made with malicious intent cannot be undone with an apology.

NTA

UsualUnSub

you are not the asshole.

I think you should tell your sister that she and your ex-husband ruined your life,
ruined your sense of family and that there is no recovery from it. The trust is gone.

You should also tell her that, she cannot expect you to lie about her, to protect her from her past.
You tell her, you will never do that.

You should also tell her that you however accept that your parents will keep their door open to her, but that you can no longer consider her part of your family, because she destroyed yours.

Question .. did you find a new partner or are you still single? How old are you?
I were you, I’d focus on your life … your personal serenity … You sister needs to do the same without you.

NikkiDzItAll

I encourage you to forgive her Because you don’t need to carry that burden to leave her behind. I operate from a forgiveness doesn’t mean I’ve forgotten. So keep that SAME ENERGY you used to justify your Fuckery & I’ll keep it moving like you no longer exist. We have Nothing to talk about.

The point remains, Her actions had consequences she wasn’t prepared to deal with. Even NOW she refuses to Own up to what she’s done. She wants You to “get over” her betrayal just because time has passed. Telling her you wouldn’t care if she died Was a bit harsh But 100% justified!

Funny her ex found out the truth from you.

SadieGK

YTA. I completely understand how deeply hurt you were by your sister’s actions, and I don’t blame you for feeling betrayed. But holding onto that anger for 7 years and telling her you wouldn’t care if she died is incredibly harsh. People make mistakes, and while what she did was unforgivable to you and I wouldnt forgibe either, holding onto this bitterness and being so cruel will only hurt you more in the long run. You’re entitled to your feelings, but that comment crossed a line and shows a lack of empathy, even if she’s hurt you in the past. Maybe it’s time to let go of the anger for your own peace of mind.
Silly_Bunnyy

**NTA.**

Your sister’s betrayal was profound and life-altering. You have every right to set and maintain boundaries, especially with someone who inflicted such deep pain. Her trying to rewrite history to her fiancé is dishonest, and you were justified in correcting the narrative.

Your response to her confronting you—though harsh—reflects the magnitude of the hurt she caused and your firm stance on protecting your peace. Reconciliation is not owed, regardless of time passed or familial ties. While your words may have been blunt, they were a direct reflection of your truth and boundaries.

Personal-Wolf9689

It wasn’t a one time fling and she stayed with ops ex husband after they separated for years and had a child with him. She was not remorseful at all because if she was she would’ve dropped him hard and fast and grovel and beg for forgiveness instead she stayed with him and now that he dumped her she is trying to reconciled but having a fiancé that doesn’t know anything to fight for her without having all the pieces, he went to bat for her but didn’t get told he had a plastic bat while she is throw honest fast balls, he had no chance when he realized he was still in the dugout
Left-Ad-2496

NTA

The fiancé certainly ate up all his own words! He called you out but he ended up abandoning her himself. LOL

Tell your Aunty you hope she drops dead soon too. How would she like it if someone she loves slept with her sibling & had an affair child? She needs to stay in her lane. Forgiveness is earned & only your parents seem to understand that their cheater daughter has not changed. Who the heck lies to a new man about her circumstances? everyone knows about it. 🤦🏽‍♀️

ben_kosar

NTA. Sometimes you gotta cut the cancer out of your life. Way to move on. Proud of you. Having a baby from the union as well? Just eww. Hell no.

Be careful of your parents/family trying to secretly invite her to things to try to force you two to ‘make up’.

This woman is pretty inhuman for her actions. Played stupid games. Found out. It’s a lonely road.

Never give in. Never forget. Way to hold strong.

dreamybutterflywish

NTA. I totally get why you’re still angry and hurt. What your sister did was unforgivable, and the fact that she’s expecting you to just move on like nothing happened is wild. You didn’t lie to her fiancé, you told him the truth. She was the one who betrayed you, not the other way around. She doesn’t get to demand forgiveness just because time passed—she hasn’t shown any real remorse, from what I can tell.
Extension_Camel_3844

She outright lied to him about the truth of the situation to try and make herself look better and make you look like the bad guy then has the gault to be mad at you for not covering up for her and allowing yourself to be made out to be the bad guy to the fiancé? Is she insane? How does one forgive someone who still hasn’t even accepted her role in what happened? NTA. Family is catering to a narcissist.
Final-Machine8725

There’s always a family member with the idea of “you can’t be horrible to family” when the damage is done and they want you to forgive someone but never that same idea when someone is doing the damage. Your aunt is either a horrible human being herself or dumb as rocks.

NTA, this level of betrayal is something you can never come back from especially it being your own sister.

Internal-Worth-8095

NTA she deserves it she knew what she was doing tell them to put them self in your position two people who you loved the most betrayed you in a worse way possible and you should go low contact with family members like that. Don’t forgive her she’s trying to get rid of her own guilt. And stand on business the words you said to her was right you didn’t do nothing wrong.
Special_Respond7372

NTA. If I were your sister, I wouldn’t expect forgiveness from you. To participate in an affair with your *sisters* husband is even worse than a regular affair. Your sister didn’t respect you, or care about you or your feelings, but expects you to care for her and hers now. Nope. The only person who gets to decide if they want to forgive is you, and you alone.
NefariousnessFresh24

Stealing another person’s partner is evil as well, let alone family

Then again, this person no longer is family to you, so why should you care?

And well, she took the man you loved (at the time), and now because of this she lost the man she supposedly loves… you are not the cause, you are simply the manifest agent of righteous retribution

chumleymom

She has not matured and she keeps making shitty decisions and her whole life is f…ed up. Stay away from her. Any normal person once they find out what she did to her own sister should run. Employer, friend, family member or any person she gets in a relationship with should be very afraid. She still has no remorse for what she did to you.
cupcakedreamland

You’re not the asshole for setting boundaries after your sister’s betrayal, but your response was harsh. It’s understandable to be angry, but expressing your feelings with more compassion could’ve prevented further hurt, especially to your sister and family. You’re justified in your feelings, but there’s a kinder way to communicate them.
Green-Pool-5869

NTA. Your sister played the lead role in shattering your life, and now she’s upset the truth made an encore? Actions have consequences, even seven years later. You’re not obligated to forgive someone just because they’re uncomfortable facing their own history. Family doesn’t get a free pass to wreck your life and then demand hugs after.
CatJarmansPants

The dildo of consequence rarely arrives fully lubed…

While her crime – and fuck me, if you’re going going to do it – is shagging your husband, her *stupidity* is letting the new BF within a thousand miles of you. she knows you hold a grudge, and they she makes up some bollocks and gives him your number.

Dumb as a bag of hair.

savinathewhite

NTA. Well shucks, if it isn’t the consequences of her own decisions coming home to roost.

You owe her nothing. If she’s still hiding from a potential spouse her history of being a lying, cheating, POS, then she is still a lying, cheating, POS, and hasn’t changed at all.

Glad her ex fiancé got the truth before the wedding.

rasalscan

NTA. Aside from everyone’s comments I think you should also look at your relatives response. Your aunt saying that you are treating sister worse than she treated you? Oh, did you break a marriage, a home, and then spend years after with your sisters dude? No? Hmm…I’d never speak to that aunt again either.
Ok-Reply9552

Your aunt can stfu and mind her business. Nta. Your sister literally doesn’t feel bad about what she’s done since she won’t stay the hell away from you. Even if she did, she still wouldn’t deserve forgiveness. I also love the energy. Most Reddit ops are so soft and forgive their siblings for this.
mustang19671967

Good for you , I am so proud also your parents seem to realize you are right but can understand them still seeing her and grandchild .

I’m glad the fiancé left her when he knew how vile and disgusting she is and want you to know it’s good that you have shown her how
Consequences work

BlueGreen_1956

NTA

Just reading this, I can say for sure that your sister repulses me, too.

Your aunt is as bad as your sister is. If she is married, you might wonder whether your uncle knows she is probably a disgusting cheater, too.

Fuck the both of them.

Chaoticgood790

You sister can choke. The NERVE of her trying to paint you as jealous for dating an ex (which hello is also not okay in most cases). I wouldn’t forgive her and she hasn’t changed. Luckily for you karma seems to have done wonders on her
Cybermagetx

Nta. She lied to her new guy cause the truth would make her single again. Any decent man would never get with a women who fucked thier sisters husband. She knows this.

Tell your aunt to fuck off and ask her who she cheated with?

SilverDryad

Lying to the new fiance shows no growth or accountability. Letting him confront you and expecting you to uphold her lie is just incredible stupidity. Certainly proof you cannot have a healthy relationship with her. NTA
dana-banana11

She’s making it impossible to forgive her. She doesn’t show remorse, doesn’t take responsibility but acts like a victim and tries to make you look like a jerk. Your NTA, but your sister is and her ex fiancee too.
Fredredphooey

NTA. Your mom is incorrect. Sleeping with your husband in your own bed will always be worse than name calling and if your mom really thinks that you’re being worse to your sister, she’s deranged. 
Proud-Geek1019

NTA. If she feels the past should be forgiven, she should have been honest with her ex-fiance. Period. She KNOWS what she did is unforgivable.
FryOneFatManic

If she truly had remorse, she would have told her fiancé the brutal truth.

But she didn’t, and still doesn’t care, given the lies she told.

Remarkable-Low-643

But she isn’t your family. What does your aunt not get? Blood of the covenant is thicker than water of womb. 
Perfect_Ring3489

Nta. I would not forgive her either. Easy for others to judge and comment when she didnt do it to them
SpringfieldMO_Daddy

NTA. When someone harms you to that degree – you should keep them as far away as possible.
KWS1461

So she thought starting her new marriage off with a lie was the way to go, stupid woman.
19Spicy_Goth

Yikes, your sister sounds like she’s still living in a Lifetime movie. NTA.
Fire_or_water_kai

NTA

I’m willing to bet auntie has a shady past and is projecting.

stonersrus19

NTAH Blood of the covenant is thicker than water of the womb.
FiFi2789

Well, actions have consequences.

I wouldn’t forgive either.

Frot19771a

Forgiveness is personal, no one can demand it from you.

Conclusion

The original poster is currently facing strong disapproval from her family because she has maintained seven years of absolute no-contact and expressed extreme finality regarding reconciliation, including stating she would not care if her sister died. The central conflict lies between the OP’s justified need to protect herself from the profound betrayal she experienced and her family’s expectation that the passage of time mandates forgiveness and acceptance, especially toward a sibling.

The core question for debate is whether the OP’s steadfast refusal to forgive, coupled with her harsh final words, is an appropriate boundary protecting her emotional well-being after severe betrayal, or if it crosses a line into excessive cruelty that undermines necessary family ties. Readers must consider where the line between self-preservation and unforgiving hostility should be drawn.

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