AITAH for wanting to get a DNA test for my eldest daughter (11F)?

A father who’s raised his 11-year-old daughter since birth can’t shake a quiet suspicion sparked by his ex’s repeated emotional affairs with another man. The girl looks nothing like him but exactly like her mom, and those old betrayals keep resurfacing now that the ex is officially with that same guy.

He’s crystal clear: he loves this girl with everything he has, calls her his daughter no matter what, and would never treat her differently or tell her the results. All he wants is a secret DNA test for his own peace of mind after carrying this doubt for over ten years. The question tore the online community apart—some urge him to get answers, others warn it could shatter everything unnecessarily.

AITAH for wanting to get a DNA test for my eldest daughter (11F)?

The doubts trace back to the very beginning of the relationship that produced two daughters.

I (35M) have two daughters (11 and 5) from an 11-year relationship that ended a couple of years ago.

My ex and I had a complicated history — she had what she described as emotional affairs with the same man multiple times while we were together.

They had dated before she and I met, worked together during our relationship, and are now officially together.

Suspicion first hit when the eldest was still a toddler.

The first time I found out about her emotional involvement with him was when our eldest was around 2. She always insisted it was never physical,

but given the nature and frequency of their connection — and the fact that she worked in a very affair-heavy environment — I’ve always had lingering doubts.

Physical resemblance—or lack of it—keeps fueling the quiet worry.

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Our eldest was conceived very early in our relationship, and she doesn’t resemble me at all. She’s the spitting image of her mother,

which might mean nothing — but combined with the history, it’s left me with a small but persistent feeling that maybe she isn’t biologically mine.

He stressed his unconditional love while explaining why the idea of testing won’t go away.

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Let me be absolutely clear: I love her deeply. She is my daughter in every way that matters, and that will never change — no matter what a test says.

I have zero intention of telling her or treating her differently. I will always be her dad. The reason I’m even considering a DNA test is purely for my own...

The doubt has lived in my head for over a decade, and now that my ex is in a full relationship with this man again, it’s gotten harder to ignore....

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So, Reddit — AITAH for considering a DNA test on my eldest daughter just to put this to rest, even though I have no intention of ever changing my role...

Lingering paternity doubt after infidelity is surprisingly common and can weigh heavily over time. Therapists often see it resurface during major life changes, like a divorce or the ex moving on permanently.

Many counselors caution that even secret testing carries risks. Clinical psychologist Dr. Alexandra Solomon notes that “knowledge changes us, whether we want it to or not—learning a child isn’t biologically yours can subtly shift feelings, even unconsciously.”

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On the flip side, unresolved suspicion can erode mental health too. Some experts suggest discreet testing only if the parent truly believes biology won’t affect their bond, paired with therapy to process results either way.

Practical options include private ancestry-style kits that feel less clinical, or professional counseling first to weigh emotional costs. Medical history matters as well—if paternity differs, accurate family health info becomes crucial down the line.

Here’s the input from the Reddit crowd:

Plenty of users firmly warned against testing, stressing the potential damage to the father-daughter bond.

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para_2691 − NTA if you are doubting paternity then ask for one, but be prepared for the consequences, your daughter is 11,

she will understand what is happening and will be the one subjected to testing, and will want to know why, this is a huge deal for her,

if you truly think that whatever the result you will love her like a daughter then think what you are risking by demanding this of her and if the result...

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Fragrant-Reserve4832 − Playing devil's advocate op. .. What can you gain from this vs what can you lose? You can only gain heartache and complications into,

unless you plan to cut the kid off, in which case I still can only see heartache and problems. You stand to lose your relationship with your eldest daughter.

You can just accept there is a chance she isn't biologically yours but moraly and spiritually (the bits that count) you are her father

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MonteCristo85 − If you find out she isnt, you have to tell her. Are you prepared for that? And if it doesnt matter, why does it matter?

Edit: I've blocked the p__cho who responded to me, but if anyone else has to read that trash, my apologies. You dont drop a child you've loved and raised for...

That's insane, and frankly, evil. It doesnt make you less of a person to love an innocent person.

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Four_beastlings − I'm not going to call you an a__hole, but regardless of the test results you will be destroying your relationship with your daughter. She will be deeply hurt...

JackB041334 − I’ve wondered for 34 years but at this point it wouldn’t change a thing. I’m the dad. That’s the end of it. If it won’t change anything between...

Others suggested gentler approaches or professional help before deciding.

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OnlyOnTuesdays289 − Either do the test and tell no one or go to therapy to deal with these persistent thoughts. Good luck.

LolaLazuliLapis − NTA. I was going to say that if it wouldn't change anything, don't do it, but she does need her medical history if you aren't the father.

VeeBee05 − Can you do an ancestry test? I feel like that is good enough as a paternity test but without the questions from the 11 year old.

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Also do yours first, get excited about it then discuss with the 11 year old. If it comes across as something you are into rather than you being suspicious of...

SafeWord9999 − Do the test on all your kids

Relative_Dimensions − You’re NTA but I do think you’re naïve about the potential impact. I strongly recommend booking a couple of sessions with a professional therapist _before_ you make your...

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Having the answer will make a difference. It absolutely will, no matter how much you don’t want it to, and you should discuss the potential effects and plan some strategies...

A few encouraged going ahead quietly for closure.

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Atrkrupt1 − No way, man. Leave that alone. After 11 years, you are her father, bloodwork be damned. I couldn't risk it.

[Reddit User] − Coming from a dad who went through this, don’t do it. You love them. You consider them yours no matter what. Then the answer doesn’t matter.

sewergratefern − I think it's time to get off reddit and see a therapist. They can probably walk you through the emotional toll of doing it or not doing it....

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Constant_Humor181 − No, do it for your own peace of mind. You'll always wonder until you get it confirmed and it's better to do it sooner rather than later. You...

We-Dont-Sush-Here − You said that you will not change your relationship with your ‘daughter’ even if she isn’t your daughter.

But I doubt that you, or anyone, could put that knowledge aside. For your sake and for your daughter’s sake, don’t do it. You can’t risk it.

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This gut-wrenching dilemma highlights how old betrayals can echo for years, even when love for a child stays rock solid. Most agree the dad isn’t wrong for feeling doubt, but opinions split sharply on whether answers are worth possible fallout. At the end of the day, fatherhood runs deeper than DNA for many. Would you seek the truth in his shoes, or let sleeping doubts lie to protect the bond?

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