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“You Are Not an Aunt, But Can I Have Your Kidney?”: A Sibling Dilemma

by Carolyn Mullet
December 20, 2025
in Social Issues

Family obligations can be tricky to navigate even when relationships are sunny and warm. But when you add years of estrangement and painful history into the mix, things get very complicated. We often wonder how much we owe to people who share our DNA but not our lives.

One young woman found herself facing a truly monumental choice. After being kept at arm’s length by her half-sister for years, she was suddenly asked for a life-saving favor. The situation raised deep questions about bodily autonomy, honesty, and the emotional cost of being the “other” sibling.

It is a story that explores the quiet, difficult decisions we make to protect our own futures. It touches on the heavy burden of guilt and the complicated freedom of saying no. Let us explore how this sensitive situation unfolded.

The Story:

"You Are Not an Aunt, But Can I Have Your Kidney?": A Sibling Dilemma
Not the actual photo

My Half Sister has asked me to donate a kidney for her. I'm a match, but told her I wasn't?

tl;dr: I am a match for my half-sister and she wants me to consider donating.

I have not told her I am a match and do not want to donate to her.

Edited this for clarity. My phone sort of sucks. The TLDR is pretty much the gist of it.

I (29f) am not close with my half sister Kara (33f). She has always been very clear about not wanting to be close.

She never takes up offers to stay with me and the only times I have seen my 'nieces' have been when I ask.

I drive up, I take them out to dinner, and she calls the night short because they have an early bedtime.

She has told me that she doesn't want them calling me auntie because it would be validating my father's cheating.

Which is true, I am the cheating baby. Still, I wanted to have a relationship with my nieces 4 and 6 but have now pretty much given up.

I talk to them on the phone bimonthly. I sent presents and write them letters.

I am much closer to my brother's kids and am an auntie to several friends' offspring.

Kara (33f) called me up last month and asked to get coffee. We are about two hours apart, so it's a bit of a drive to see her.

I agreed, she sounded rough. While Kara is my half-sister, she has no relation with my brother (who was adopted).

There isn't a lot of other family members around to ask. Most are either too old, too young, or not a match.

My aunt (67) could not donate even if she was a match. Most of Kara's friends have tried and they are not matches.

She asked me to get tested. I agreed, thinking I wouldn't be a match. Turns out I am.

My husband and I decided that I wouldn't donate because we want to have kids in the future and I don't want to risk my health.

The doctor agreed to tell Kara I am not a match. I have seen what happens to people who donate.

I have a friend who donated and her life is fucked. She has a lot of health problems,

couldn't do the things she did before, and she is only 27. At 29, I don't want to suffer the same fate for the rest of my life.

I just wonder if I should be honest with her at all? Will it do any good to tell her I am a match

but I have reasons to not do it (wanting to have a child, not wanting to be ill?) Would it just make it worse?

She has already been told that I am not a match and put on a waiting list.

Part of me thinks I am being selfish for wanting to tell her. Another part of me feels I shouldn't be lying to her about who I am.

We have never been close, so I feel it's wrong to pretend I am on her side when really I am deciding to put my own health and life first.

Do I tell her? Or do I not? I jut wondered how to handle this.

This is one of those stories that really makes you pause and take a deep breath. It is so hard to balance the desire to be a “good person” with the need to protect yourself. The OP has carried the label of the “cheating baby” for her entire life. That is a heavy weight for anyone to bear, especially when it results in rejection from her own sister.

It is heartbreaking that the only time a bridge was built was when something was needed from her. While it is wonderful that medical science allows us to help one another, donating an organ is a massive personal sacrifice. It requires deep love or a very strong sense of altruism.

When that emotional foundation is missing, the request feels incredibly heavy. It is completely understandable why she feels conflicted about the secret.

Expert Opinion

The decision to become a living organ donor is one of the most personal choices a human being can make. Medical ethics place a huge emphasis on the donor’s well-being, both physically and mentally. This is why the “medical alibi” exists.

According to bioethicists, transplant teams often offer to tell the recipient that the donor was not a match or was medically unsuitable. This protects the donor from family pressure or coercion. It allows the potential donor to say no without destroying their relationships or facing hostility from desperate relatives.

In this case, the OP mentioned fearing long-term health effects. It is important to note that while all surgeries carry risk, data from the National Kidney Foundation shows that most living donors live long, healthy lives. The risks of complications are generally low for healthy individuals.

However, psychological readiness is just as important as physical readiness. Dr. Mary Helen Immordino-Yang, a neuroscientist who studies emotion, emphasizes that our bodies and brains are connected. Making a medical sacrifice out of guilt or obligation rather than genuine desire can lead to complex psychological trauma later.

Experts at sources like The Hastings Center discuss the importance of autonomy. No one owes another person a body part, regardless of family ties. If the relationship is fraught with pain, as it is here, declining is a valid boundary. The OP prioritized her potential future family and her own peace, which is a choice she has every right to make.

Community Opinions

The online community wrapped their arms around the OP with understanding and validation. They reassured her that her body belongs to her alone.

Commenters explained why the doctors were so quick to offer a cover story.

Spoonbills − Doctors are obligated to follow some pretty arcane ethical rules.

If an ethical doctor agrees to obscure your test results, there's a good reason for it...

You do not deserve to be criticized or have your life made otherwise difficult for choosing not to donate.

ThrownMaxibon − There's a reason the doctor agreed to lie for you.

People have been pressured and shamed into donating by family and friends.

fuzzyqueen − Honestly they won't allow you to donate unless you are 100% willing to do so.

If you aren't, they won't clear you as a matched donor. That's why they give you the results in private.

People who had actually donated organs chimed in to support her choice.

[Reddit User] − I donated a kidney six years ago...

When you go through pre-donation screening, part of the process is a psychological screen to make sure you are willing...

During my screening the doctors explicitly offered to lie and make up a reason for why I couldn't donate...

[Reddit User] − You decided not to donate. You don't need to tell her the reasons.

Some users wanted to make sure the OP knew that donation is usually safe, even if her choice was still valid.

embo13 − ...kidney donors actually tend to do BETTER than OR just AS WELL as the general population...

PLEASE -at the very least- in honor of your sister and all those on the waiting list... do not pass around misinformation regarding donation.

[Reddit User] − Whatever you decide is fine, but living with a single kidney is not going to "f__k" your life...

Please don't scare people from living donation because you don't want it.

Readers noticed the sister only reached out when she needed something big.

[Reddit User] − So you aren't her kids Auntie but you ARE her sister? Sounds like you are family when it suits her. Keep your organs.

cursethedarkness − Don't tell her... She still thinks that your existence validates your fathers' cheating,

and I suspect that she views you mostly as an organ farm. Distance yourself and go on with your life.

Fitzwilliger − They offer to lie for a reason- because no one should be pressured into this kind of decision... Let it stand.

How to Navigate a Situation Like This

If you face a major request that feels too big or unsafe for you, remember that “no” is a complete sentence. In medical situations, you have an extra layer of protection. Lean on the professionals. They are trained to be the “bad guy” so you can preserve your family relationships.

It is also helpful to release the guilt. You cannot pour from an empty cup, and you cannot give a part of yourself if your heart isn’t in it. Honesty is a virtue, but in cases like this, kindness sometimes looks like a gentle omission. Protecting the other person from the pain of rejection is, in its own way, a caring act.

Conclusion

This story highlights the tender intersection of biology and biography. While the OP had the biological goods to help, the biography of their relationship made it impossible. She chose to trust her doctor’s guidance and keep her medical truth private.

It leaves us with a thoughtful question. Is a “white lie” okay if it prevents a family from falling apart completely? How would you handle knowing you could help someone who had pushed you away? Let us know your thoughts in the comments.

WHAT DO YOU THINK OF THIS STORY?

WHAT DO YOU THINK OF THIS STORY?

OP Is Not The AH (NTA) 0/0 votes | 0%
OP Is Definitely The AH (YTA) 0/0 votes | 0%
No One Is The AH Here (NAH) 0/0 votes | 0%
Everybody Sucks Here (ESH) 0/0 votes | 0%
Need More INFO (INFO) 0/0 votes | 0%

Carolyn Mullet

Carolyn Mullet

Carolyn Mullet is in charge of planning and content process management, business development, social media, strategic partnership relations, brand building, and PR for DailyHighlight. Before joining Dailyhighlight, she served as the Vice President of Editorial Development at Aubtu Today, and as a senior editor at various magazines and media agencies.

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