Future MIL keeps insisting my fiancé and I are siblings to ruin our wedding

The OP (23F) is engaged to her fiancé, Daniel (24M), who comes from a wealthy family, contrasting with the OP’s more modest background. Despite the difference in upbringing, the couple shares a strong connection based on similar values, humor, and interests, leading to a deep bond.

The core conflict has arisen from Daniel’s stepmother, Valerie, who has become increasingly insistent that the OP and Daniel are emotionally or even distantly related, referring to them as “the twins” and presenting a fabricated family tree. When the OP expressed discomfort, Daniel dismissed her concerns, stating she was overthinking Valerie’s behavior. The OP is now deeply unsettled and questioning whether to proceed with the wedding due to this toxic dynamic.

Future MIL keeps insisting my fiancé and I are siblings to ruin our wedding

So, I (23F) am engaged to my fiancé, Daniel (24M). He’s the son of a very wealthy businessman, and to be honest, I come from a much more humble background. We met a few years ago at a mutual friend’s party and hit it off immediately.

We have a ton in common—same sense of humor, similar values, we’re both super family-oriented, and we have the same weird taste in music. We even share similar quirks and habits that make us seem like we’ve known each other forever.

Basically, we just click.

Here’s where the problem starts. Daniel’s father remarried a few years ago to a woman named Valerie. She’s in her mid-40s and, well, let’s just say she’s not the nicest person. She’s always been kind of cold to me, but I didn’t think much of it.

A little passive-aggressive here and there, but nothing crazy.

However, over the last few months, things have started getting out of hand. Valerie started making these strange comments, usually when we’re alone or in private settings. She has started implying that Daniel and I are too close for fiancés.

The first time she said it, I laughed it off, thinking it was some weird joke. But then it kept happening. She started pushing the idea that Daniel and I are not just fiancé and fiancée, but rather brother and sister in some kind of spiritual or emotional sense.

She kept saying things like, “It’s just like the way real siblings can talk for hours about nothing” or “You two look so much alike, I’m surprised you haven’t figured out you’re actually related.”

I thought she was just being bizarre, but it kept escalating. At one point, she showed up at one of our family gatherings with this family tree thing that supposedly proves Daniel and I could be distant cousins.

The family laughed it off, but the whole thing left me feeling unsettled. I’m not sure why she’s so obsessed with this narrative, but she even started calling us “the twins” in front of other people, which made me feel super uncomfortable.

I’ve talked to Daniel about it a few times, and he says I’m overthinking it, that Valerie is just trying to get under my skin. But at this point, I’m not so sure. I feel like Valerie is intentionally trying to paint us as siblings to make me feel uncomfortable and to undermine our relationship.

And it’s really starting to mess with my head.

We’re supposed to get married in a few months, but now I’m seriously considering calling it off. I don’t know if I can marry into a family that has this kind of weird, toxic dynamic.

I don’t want to feel like a part of this twisted narrative that’s being forced on us. Daniel says I’m letting Valerie win by even thinking about this, but it’s messing with my head so much that I don’t know if I can go through with it.

So, AITA for thinking about calling off my wedding because of Valerie’s insistence that Daniel and I are siblings? Should I just brush it off like Daniel wants, or is this a sign that something deeper is wrong here?

Here’s how people reacted:

Fabulous-Fill-2156

I don’t think you’re an asshole but you shouldn’t call off your wedding for this. You should let Daniel know that it makes you very uncomfortable and you would like it to stop. That can happen 1 of 3 ways:

1) Daniel can speak to his stepmother and tell her that her obsession with trying to insist you all are siblings is creepy, inappropriate, and not funny. Then set a hard boundary that if she brings it up you two will call it out as “disgusting and creepy” then immediately leave. You two then need to present a united front every single time it happens.

2) You can speak to her and communicate the same thing if you are comfortable doing it yourself. 

3) Daniel lets his dad and stepmother know that you will be going LC or NC because the “jokes” about being siblings are hurtful and inappropriate. 

This is an opportunity for you and your future husband to work together as a team to solve a problem. 

NJtoOx

I get where the other commenters are coming from saying you shouldn’t let her ruin your relationship but I’m gonna go with NTA

here’s the thing: she is consistently making you uncomfortable *on purpose* and no one is doing anything to stand up for you and put a stop to it. It doesn’t even really matter what exactly she’s doing, you’ve expressed multiple times that you’re uncomfortable and want her to stop and yet everyone in this family, your fiance included, are happy to allow her to continue to poke at you. Why is that? Why are they all fine with letting her make you uncomfortable and why is it that when you talk to your fiance about it he brushes you off? I wouldn’t want to marry into this kind of dynamic either

meanderingwanderlost

It’s easy for Daniel and other people to say brush it off when they’re not the target. Repeated comments and degradation wear you down over time. Everyone is correct that if you break up, her plan worked. Don’t be alone with this woman. When she brings it up in front of other people, you need to be strong enough to stand up to her. It doesn’t have to be big, but a “what a weird thing to say. You’re thinking an AWFUL lot about our relationship. Is this how you act with your siblings?” Turn it back to her.

This shouldn’t be a big deal, but it does require going outside your comfort zone to confront her. At the end of the day, is Daniel worth fighting this battle for?

FoxySlyOldStoatyFox

If Valerie predominantly makes these comments when it’s just you and her, why not retaliate in kind. 

“Oh *Valerie.* I know that you have a weird fetish for watching incest porn. Daniel’s dad has told me – and if it’s OK with him then who am I to judge? But honestly, it’s not my bag. You’ll have to find someone else to watch your set of illegal films with, as I can’t imagine they’d do anything for me.” Then leave. Also, deny everything if questioned, but say you’ve been worried about Valerie’s constant suggestions that you and Daniel are related for sone time, and to wonder if she could do with some professional assistance. 

Fight fire with petrol. 

grruser

If you are going to marry in to wealth then you will have to field this kind of petty jealous bullshit. Valerie has succeded in getting under your skin; and your fiance is right, you should ignore her. He is probably used to the kind of manipulations and bullshit that comes with his wealth, but you aren’t. Maybe give it a little more time; and find a trustworthy mentor or friend who can help keep you grounded; because this shit won’t stop; whether it be Valerie or someone else. Money corrupts, people are greedy and self centred and pretentious. You will need to learn how to manage this dynamic in the relationships of your new fam.
Best_Imagination_412

She is trying to break you up to fix Daniel up with one of her relatives. Does she have a daughter or niece or something waiting in the wind for the break-up? She definitely has a sneaky motive to keep picking at you.

While I understand your concerns, if you love him, marry him. Don’t let the witch break you up. And stand up for yourself! Tell her to cut the crap and stop making these comments at your expense. You don’t find it funny and she needs to stop. Daniel needs to tell her to shut up and encourage his dad to leave you alone. If you stand up for yourself and Daniel doesn’t back you, then you have bigger problems.

Spidiffpaffpuff

“I’ve talked to Daniel about it a few times, and he says I’m overthinking it, that Valerie is just trying to get under my skin.”

If she constantly tries to get under your skin, your partner should care about that. He should have your back.

“Should I just brush it off like Daniel wants, or is this a sign that something deeper is wrong here?”

It seems there is something wrong with your partner’s allegiance to you. Maybe this is just a phase that Valerie is going through. But maybe this is a preview of what your life is going to be like, if you don’t set clear boundaries right now.

MmaRamotsweOS

Listen, she doesn’t love her husband it seems. Never did. I would also bet she never had a connection with anyone else, friend OR lover, like you and your fiance. All of her obsessive crap is screaming with envy. She’s consumed by it. Don’t let it consume you as well. Go LC with her until the wedding, then NC if possible afterwards. Don’t ever be alone with her, don’t engage in conversation with her. Do not indulge her delusions. This is what she wants, for you to split up. Don’t give it to her.
PristineCream5550

No one is ever the AH who feels genuinely upset about someone overstepping their boundaries constantly. It is not okay. But also my greater concern is that your fiancé isn’t validating your discomfort with Valerie’s inappropriate behavior and your would-be FIL is calling you sensitive and cruel. Those would be dealbreakers for me. She would overstep boundaries all the time going forward and no one in the family would put a stop to it or even validate your concerns. That’s a huge no.
Different_Road5028

If you can let this woman’s behavior make you reconsider marrying him, I don’t think you’re ready to be his wife. It is incredibly sad that this troll and bitch of a woman has this type of influence on you.
If you can let this woman’s behavior make you reconsider marrying him, I don’t think you’re ready to be his wife. It is incredibly sad that this troll and bitch of a woman has this type of influence on you.

You’re a threat to her cash cow. Can you really not see this?

gorillaboy75

Why would you let some lady you barely know ruin your relationship. You don’t have to marry her, just her step son. You should say something like, Val, when you makes these jokes about us being twins, or cousins, or siblings, it’s creepy and we don’t like it. Could you please cut that joke? Who cares what she thinks or if she’s mad? If you love Daniel, then nobody should be able to stop you from being happy with him. You’re giving her way too much power. Good luck!
No_Teacher_3313

Sounds like she doesn’t want any grandchildren she might have to share an inheritance with.

There are so many ways to handle this. Tell her loudly she’s letting her sibling kink run too wild.Tell her yes, you’re soul mates, and you’re surprised that she and her husband are still together given that they have so little in common. Ignore her. Go low contact. Lots of options better than calling off the wedding.

Ok_Childhood_9774

NTA, and Valerie needs to be told point blank, preferably by Daniel, that her comments are rude, ridiculous, and unwelcome, and that if she repeats them to anyone again, her wedding invitation will be permanently rescinded. I’m not sure why it’s been allowed to continue for so long, but it needs to stop now. If Daniel is unwilling or unable to do that, then I think reconsidering the marriage might be wise.
marbot99

Valerie has as much power as you give her. Chances are, everyone thinks she’s a nut and dismisses her. But because you don’t, she feeds off of it. Grey rock her. Treat her like a vase in the room. Be emotionless when you talk to her. When you have no answer for her comments, just blankly stare at her as you would a cloud formation in the sky. She’ll get bored with you and move on to her next victim.
Confident-Baker5286

Whenever she starts talking like this look really uncomfortable, look away, and then loudly say “ Valerie I have asked you repeatedly not to speak to me about your incest  fetish, it makes me and everyone else uncomfortable” and the quickly walk away while looking behind you to make sure she isn’t following you. She will look like a psycho no matter what she says or does after that
SitcomKid411

YTA. What this weirdo thinks has nothing to do with your relationship with Daniel. Valerie is inserting herself and trying to be relevant because of all the attention you are getting.

My husband and I finish each others sentences and have since day 1. His sister and I favor. We are not related and if someone thinks we are and insist on it, I’d shake my head and live my life.

celticmusebooks

I don’t understand why you don’t just have an Ancestry DNA test done and make a huge splashy social media post afterward mentioning Val’s fixation with your “connection” and how now it’s totally set to rest, add a ton of LOL’s and every time she brings it up remind her of the test and start making concerned faces and ask if maybe she should think about a dementia screening.
Material_Cellist4133

YTA.

This woman is clearly trying to break you two up. Probably for inheritance.

Play her game instead of letting her get to you….

“FIL I didn’t know you slept with my mother”

“SMIL are you trying to get us to break up so your daughter has a real chance at a incestous relationship with fiance”

“What perverted environment did you grow up in to think this is normal talk”

Victor-Grimm

YTA-Your Fiance is right. She is in your head and probably knows it. She doesn’t want you to have influence over the family. You cancel them she wins and you just get a failed relationship with what potentially could have been a great guy.

Everyone knows she sounds like an idiot so let it go until she does something even your in-laws can’t handle.

Perimentalpause

NTA. “Stop trying to live out your weird incest fantasy through us. That’s gross.” Just keep turning it back around on her. “Why are you so interested in our sex life? Is (fiance’s dad) not doing it for you? You need some sick kink to get off? Or maybe you’ve got the hots for your ‘son’? Ew. You’re gross.”
Emotional_Bite9659

Idk if you’re the AH. However, If your soon to be husband can’t set her straight knowing you’re uncomfortable that would be a red flag for me. That’s his family so it’s his job to check her. If he can’t take how you feel serious, then maybe you shouldn’t be getting married.
GlamG0ddess

NTA. Honestly, I think Valerie just has a weird crush on you and is trying to justify it by creating some twisted, incestuous narrative. Daniel needs to step up and shut her down, or this will continue to be a problem in your relationship. Also, get a restraining order.
yellow5red40

Lol I’d fight her by implying that she’s mentally impaired -suggest kindly that if she’s making strange connections in her head that aren’t, there maybe she should see a professional. Early onset dementia! Maybe listening to weird conspiracy theorists or something.
Tiger_Striped_Queen

Sounds like Valarie married a rich man and wants to make sure he doesn’t leave money to his son by breaking up his relationships and causing a rift between father and son.

Does your fiancée’s father hear this? What does he say about his supposed daughter?

JTBlakeinNYC

NTA, but her fixation on this imaginary narrative has now gone well beyond “quirky” and “cringe” and is passing “unhinged” on its way to psychiatric assessment warranted ASAP. What does your fiancé’s father say about her bizarre delusion?
SparkyandDolche

Why don’t you sign up for ancestry and do your own family trees to see if you’re related if it bothers you?

On the other hand, if you’re considering calling off the wedding (for whatever reason) maybe you two shouldn’t get married.

Selfpsycho

ESH, you for ditching a relationship over someone being jealous because you actually like each other, your fiance for not telling her to f off and if necessary cutting contact, her for obvious reasons.
Imaginary-Yak-6487

You’re not marrying her, you’re marring him. She’s the toxic asshole here & you’ve let her get in your head. Everyone knows the truth & won’t/shouldn’t pay attention to what crazy bitch says.
Unhappy_Energy_741

NTA. Sounds like she doesn’t click with her husband as well as you two do. She probably married for money and is low-key jealous of you two. I’d rub it in her dumb face.
PleaseCoffeeMe

YTA. You are letting Valerie, who married into the family, affect you. If you really love Daniel, listen to him. If you don’t, then throw it all away.
dalealace

INFO: Where is your partner’s father in all this? Does he know this is happening? Why is he not weirded out she’s painting his son as incestuous?
keesouth

YWBTA. You supposedly love this man and want to get married but you’re going to let the ramblings of a crazy lady drive you away. Ignore her
Distinct_Acadia_2912

YTA  if you call off your wedding because of this witch. Go nuclear. Tell her off loudly at the next family gathering.  Humiliate her. 
Flamsterina

Real siblings don’t have to talk for hours about nothing. If you get married, she’s going to be even worse.
RevolutionaryDiet686

Keep Daniel and cut Valerie from your life. Go NC with her and leave her toxic actions behind you.
Rainmaker710

Valarie is an asshole, you need to not let it get to you, and your fiancé needs to fucking man up.
skyyxfem

NTA. Valerie’s behavior is creepy and inappropriate, and you have every right to be concerned. 🚩
lostinRC

Middle ground, make Daniel uninvited her to the wedding. His family, his burden to wrangle them.
Electrical-Seaweed40

If you would end a relationship over this, you’re not ready for marriage full stop.
tenaji9

Ignore her . You are not marrying her .

Conclusion

The OP is in a difficult position, torn between trusting her fiancé’s assurance that the stepmother’s behavior is merely an attempt to provoke her, and her own strong feelings that Valerie is intentionally undermining the romantic nature of her relationship with Daniel. The emotional toll of constantly defending her engagement against this strange narrative is severely testing her commitment.

The central question remains whether the OP should dismiss Valerie’s actions as insignificant interference, as Daniel suggests, or if this behavior represents a fundamental, unacceptable issue within her future in-law family structure. Is this behavior a red flag serious enough to warrant canceling a wedding?

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