AITA For Refusing to Cancel a $20K Wedding Venue After My Sister’s Ex Proposed to His Mistress There?

We all know that moment when an old emotional wound is unexpectedly ripped open. For one mother, watching her sister spiral over a painful past betrayal quickly became a high-stakes financial dilemma.

A perfectly planned beachfront ceremony was supposed to be the ultimate celebration for a twenty-six-year-old bride. Instead, a bitter family wedding conflict threatens to tear relatives apart, all because an estranged ex-husband chose that exact sandy stretch to propose to his former affair partner. Caught between a devastated sister demanding a location change and a daughter unwilling to surrender her lifelong dream, one mother faces an impossible choice involving a massive non-refundable deposit and fractured loyalties.

Curious how it all unfolded? The full story is right below.

AITA For Refusing to Cancel a $20K Wedding Venue After My Sister's Ex Proposed to His Mistress There?

AITA for not changing my daughter's wedding venue even though my sister's husband proposed to his 22-year-old mistress there last month?

Securing the region’s most coveted estate is usually a triumphant milestone, but this picturesque backdrop was about to become ground zero for an unexpected family crisis.

I (51F) put down a $20K non-refundable deposit on this gorgeous beachfront estate for my daughter's, let's call her Amy (26F), wedding next September. We booked it 18 months out....

Last month, my sister—let's call her Carol (53F)—found out her cheating ex-husband—let's call him Mark (55M)—proposed to his coworker (28F; she was 22 when they started having an affair) who...

She called me sobbing, begging me to change venues. She says she can't watch Amy get married where Mark proposed to a girl younger than his own daughter. She can't...

The stark financial reality collided violently with raw, unfiltered grief, transforming a practical decision into what felt like a devastating personal rejection.

I told Carol I can't lose $20K and crush Amy's dreams because Mark is trash. Carol says I'm choosing money over her mental health. She claims that I'm forcing her...

She said that it's not her fault Mark, who has been out of all our lives for the last five years, ruined that place for Carol. Carol called Amy a...

They say the place is cursed anyway, so why should we host Amy's big day there? My husband's side of the family says Carol doesn't get to hijack Amy's wedding...

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This situation perfectly illustrates how the emotional fallout of a past divorce can unexpectedly collide with the stress of modern event planning, creating a perfect storm of familial resentment. While it might be tempting to dismiss Carol’s reaction as overly dramatic since the divorce occurred five years ago, trauma from betrayal rarely follows a neat, predictable timeline. According to psychology experts, healing from infidelity requires immense emotional work, and trying to bypass that pain often means it will resurface later when triggered by new, unexpected events.

However, recognizing that infidelity trauma is valid does not mean it should dictate the actions of the entire family. A wedding is a separate, joyful milestone, and demanding a young bride forfeit a massive deposit and her dream venue crosses the line from seeking support to demanding unreasonable accommodation.

To move forward constructively, Carol must recognize that her healing is her own responsibility, which may involve returning to therapy to process this new trigger. Meanwhile, the bride’s family should continue their wedding planning with empathy but firm boundaries, ensuring the focus remains on the couple’s future rather than the past.

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Community Opinions

Reddit came in hot—nearly unanimous in their defense of the bride, with many urging the sister to seek professional help rather than demanding cancellations.

u/tosser9212 "who has been out of all out lives for the last 5 years" Carol has had five years - it is sad that the wounds are fresh and deep,...

u/Current-Photo2857 Info: Just to be clear on the timeline here… You say Mark is the EX husband, and he “has been out of all our lives for the last 5...

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u/ScarletNotThatOne NTA. If Carol can't bring herself to go to that spot, that's sad. But that's all it is. There's no need for you to lose your money, or for...

u/Adventurous_Fee9311 Nta Carol need therapy. She has been divorced for 5 years and can't get over it.  Then she thinks she has the right to order you and your daughter...

u/fingernailchewer
NTA.
I didn’t even really need to go past “20k non-refundable DEPOSIT”— in this economy, I wouldn’t let $20 slide let alone 1000x that amount.
NTA.

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u/Beneficial-Way-8742
It's been 5 years, why is she still stalking or watching her ex???   She needs to let them go so she can move on

u/Particular-Wish-1761 Update: Carol is willing to pay Amy the $20,000 nonrefundable deposit - essentially paying Amy NOT to host her wedding at that venue (I'm guessing Carol is using her...

u/DawgMom67 NTA.. Carol needs to get over it. This is her EX husband , who is clearly a dirtbag. Is she going to stay away from every place he goes...

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u/owaikeia NTA I can't get over that it's been 5 years. 5 years. I get that it might still hurt, but Carol is acting as if this happened yesterday. Maybe...

u/Gaberahamj Nta what carol's been through is terrible but when it comes to your daughters wedding carol's feelings are not the priority. Plus the venue was booked before any of...

u/Fragrant-Hyena9522 NTA. The wedding is 18 months away. Carol needs to work on her mental health between now and then. When her ex has a baby at a local hospital,...

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u/Ridergal Amy's wedding is still a year away. I wouldn't change plans based on this. Carol needs to block Mark and the other woman on social media. There is no...

u/Ok_Tonight_3703 NTA. Carol needs to stay at home. People need to understand that the world doesn’t revolve around their issues. Has Carol and “half the family” offered to give you...

u/PumpkinChipCookies
NTA, it sounds like Carol has a year to get over it or send her regrets.

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u/FunBodybuilder4620
NTA.
Your sister doesn’t have to come.
You and your daughter shouldn’t be penalized for her ex’s decisions.

A few commenters acknowledged the lingering pain of betrayal, but firmly agreed the massive financial reality made changing venues entirely unreasonable.

Navigating complex family dynamics is never easy, especially when financial pressures and deep emotional wounds collide. Do you think the mother was right to prioritize the twenty-thousand-dollar deposit and protect her daughter’s dream, or did the sister’s intense, resurfaced trauma warrant a massive financial and logistical sacrifice?

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And if you were the bride caught in the middle of this emotional tug-of-war, would you find a way to compromise to keep the peace, or would you hold firm on your chosen wedding venue? Drop your thoughts in the comments below and share your hot take!

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