AITA for not paying for my sisters surgery?

In a quiet New Zealand home, a 32-year-old woman thought she’d bridged a gap by helping her 29-year-old sister with a medically necessary breast reduction, easing her chronic pain. The funds, once saved for her own surgery, became a lifeline for family—until her 25-year-old sister demanded a share. Expecting money for a breast augmentation from A to DD cups, the youngest sister unleashed a storm of accusations when refused, claiming favoritism.

The refusal, rooted in depleted savings and the stark difference between medical need and cosmetic desire, sparked a family feud. The woman’s phone buzzed with angry messages, leaving her grappling with guilt. This Reddit saga pulls readers into a tangled web of sibling dynamics, financial boundaries, and the weight of personal choices, where empathy clashes with entitlement.

‘AITA for not paying for my sisters surgery?’

I(32f) and one of my younger sisters(29f) always had very large boobsicles. Like size 6/8 dress but E or F cup boobs minimum. My other younger sister(25f) is on the other end of the scale with A cups. About 4 years ago I had reduction surgery because I had very bad back pain caused by the weight. I

was lucky that it was covered by my insurance so I didn't need to tap into the money I'd been saving for reduction surgery. About 6 months after my surgery my sister 29f slipped down some stairs and slipped a disc in her spine.

She was in crippling amounts of pain and her doctor agreed that the weight on her chest wasn't helping her recovery but unfortunately her insurance considered reduction to be purely 'cosmetic' and wouldn't cover it.

I offered for her to use the money that I had been saving for my own reduction to get one herself and she gratefully accepted. The problem is now that pur youngest sister wants a boob increase from an A cup to a DD cup.

She has approached me asking if I would pay for it since I paid for 29fs reduction. I explained that it was a medical necessity for 20f and wasn't for 25f, additionally I no longer had that money aside as what hadn't been used for 29fs surgery had gone towards my house deposit 2 years ago.

25f is now furious with me, accusing me of playing favorites and has been blowing up my phone with n**ty messages. AITA here? I feel really guilty for not supporting my little sister?

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This family drama underscores the tension between supporting loved ones and setting financial boundaries. The woman’s decision to fund her 29-year-old sister’s breast reduction was driven by medical necessity chronic back pain exacerbated by a slipped disc using savings earmarked for her own health. Her refusal to pay for her 25-year-old sister’s breast augmentation, a purely cosmetic procedure, reflects a clear distinction between need and want, compounded by her depleted funds.

Dr. Susan Heitler, a clinical psychologist, notes, “Family conflicts often arise when expectations of equal treatment ignore differing circumstances” . The youngest sister’s demand, equating a medical procedure with a vanity-driven one, reveals an entitlement that overlooks the woman’s financial reality and the medical context. Her accusations of favoritism amplify emotional manipulation, a common tactic in family disputes.

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Large breasts can cause physical issues, as a 2020 study by the American Medical Association found, with 65% of women with D+ cups reporting back pain . Conversely, small breasts pose no health risks, making augmentation a personal choice, not a necessity. The woman’s depleted savings, used for a house deposit, further justify her refusal, as she’s not obligated to fund elective surgeries.

To navigate this, she could calmly reiterate the medical and financial reasoning, offering emotional support to her youngest sister, perhaps suggesting therapy for body image concerns. For readers, this highlights the importance of clear boundaries and open communication to prevent family entitlement from eroding relationships, ensuring support aligns with practical realities.

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Let’s dive into the reactions from Reddit:

Reddit users stood firmly with the woman, calling the 25-year-old sister’s demand entitled and her tantrum immature. They emphasized the clear difference between a medically necessary reduction and a cosmetic augmentation, noting the woman’s generosity to her other sister was specific to health needs, not a precedent for funding vanity.

Some humorously dismissed the youngest sister’s logic, comparing it to demanding equivalent medical procedures for unrelated issues, while others urged the woman to ignore the harassment and hold her ground. The community’s consensus reflects disdain for emotional manipulation and support for prioritizing practical boundaries.

[Reddit User] − NTA there's a difference between a needed reduction and getting bigger boobs which is not important or medically necessary.

ChooksGoBawk − NTA. No one should be making demands on your finances. And you’re totally right about medical necessity being a factor for 29f.. You don’t owe 25f anything and claiming otherwise makes her a brat..

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Just don’t participate in the conversation if she keeps hounding you. In case you need to hear it, you’re not 25f’s parent (or trust fund), she is an adult and can figure out how to take responsibility for herself.

Aromatic-Ice-968 − NTA. So when one of you sisters got your appendix out, did Ms. A-Cup throw a tantrum because she wanted hers out too? Did she whinge about getting a cast on her arm when one of you broke your wrist? Just because one sibling gets medical attention to one part of their body doesn't entitle each sibling to the same.

You helped your sister with a medical issue. You could tell Ms. A-Cup that when she gets a note from her physician stating that her breasts are causing her severe health risks and she must have a reduction, you might consider paying for it.. And Ms. A-cup can find a padded bra.. You don't have to pay for your sister's vanity.

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Alert-Potato − NTA - I imagine it is incredibly painful to believe that you lost the genetic lottery by not growing literally crippling sized boobs like both your sisters. That must be very difficult for your sister. Having said that, it is not the responsibility of someone who “won” that same lottery to buy her new knockers.

Your other sister was in an awful position where she medically required treatment that her insurance refused to pay for, and you helped. Being mad that she doesn’t have to contend with giant bazongas is not a medical problem.

I would suggest to her, as kindly as possible, that if she can not save up for surgery to purchase melons to replace her avocados, that she either seek therapy to make peace with her body or invest in a good collection of push up bras.

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zadidoll − NTA. Reduction was medically necessary. Getting an increase is not, it’s vanity.. Don’t be emotionally manipulated to pay for something that’s for vanity.

Ardeeke − NTA it's completely different. Your sister is being cheeky af.

Confidenceisbetter − NTA The first time you offered, your sister didn’t ask. It was also done for her health not for cosmetic purposes and you could easily spare the money as it was already saved up exactly for this purpose, even if it was originally meant for yourself.

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Your younger sister has no right to demand for you to help her as well, no matter what procedure she is getting done, cosmetic or medical, that is incredibly entitled. Moreover, she doesn’t need that procedure, she is not facing any health problems by having small boobs so if she wants bigger boobs that bad she can save up for them herself, you’re not her sponsor.

the-mirrors-truth − NTA Medical necessity and wants are two different things. Also, I think it's funny when people want something and When they don't get their way they start being rude and blowing up. Like yeah, that's the way to get someone to do you a favor.

SiameseCats3 − NTA. 29F sister did not play around with her boob size, but removed a damaging and dangerous amount of weight from her chest. 25F thinks boob surgery is boob surgery, apparently

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but this has never been about boobs but instead about horribly placed and unnecessary weight. And I also wouldn’t support this because there’s a chance going up so many cup sizes would end up giving her back pain and she’d want it undone and expect you to pay.

moonlettuce13 − Recovery from an injury being hindered because of boobage weight and wanting bigger tits just because, are two entirely different issues. While the first isn't a medical necessity, per se, it's sure as hell close to one. One of my friends had a reduction because the weight of her chest was causing back issues..

Large breasts can be painful and cause several medical issues.. Body issues over small boobs tends to come from the societal push that attractive woman = boobs. Personally, I love having small boobs.

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I can sleep on my front without being uncomfortable, and I can get away without wearing a bra. (Which also saves me money, good bras are expensive!). If your youngest sister wants an increase of boob, then she should pay for it herself. NTA.

This tale of sibling strife exposes the challenges of balancing family support with personal limits. The woman’s refusal to fund a cosmetic surgery sparked a debate about fairness, medical need, and entitlement. How would you handle a family member’s demand for financial help with a non-essential request? Share your thoughts below and let’s dive into this family drama!

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