AITA for inviting my brother’s wife and their kids but not his girlfriend and their daughter on family vacations?

What do you do when family loyalty clashes with fairness? A woman plans family vacations, always including her sister-in-law and her kids. Her brother’s infidelity complicates things. His girlfriend and their daughter are excluded, sparking tension. The girlfriend demands inclusion, citing fairness for her child.

The sister-in-law, still married to the brother, is healing from betrayal. Inviting the girlfriend risks her comfort. Family ties are tested by tough choices. At what point does loyalty to one family member hurt another? Can fairness and forgiveness coexist in such a messy situation?

‘AITA for inviting my brother’s wife and their kids but not his girlfriend and their daughter on family vacations?’

The story begins with a family tradition of vacation planning.

I’m usually the person in the family who plans family vacations. My brother is still married to his wife but she kicked him out after he got his girlfriend pregnant.

The planner remains loyal to her sister-in-law.

I love my sister-in-law and she’ll always be family to me no matter what happens between her and my brother so I’ve always invited her and her children to our...

and I plan to continue doing so. My parents also invite her to all of our other family events and have made it clear to my brother his girlfriend isn't...

Tensions rise as the girlfriend pushes back.

My brother has never said anything about it but his girlfriend is angry that her and her daughter have been continuously excluded for the last 3 years.

Her entire argument is that her daughter is getting old enough to understand that her siblings are favoured over her and it isn’t fair so I have to stop excluding...

The conflict peaks with a tough decision.

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Our next vacation is planned for February and she’s demanding I invite them but I’ve said no as I don’t want to make my sister-in-law uncomfortable since it seems like...

The conflict centers on a family vacation planner’s choice to exclude her brother’s girlfriend and their daughter. The girlfriend’s demand for inclusion clashes with loyalty to the sister-in-law, who faced betrayal. The planner prioritizes the sister-in-law’s comfort, especially as she reconsiders divorce. Emotions of loyalty, guilt, and fairness fuel the tension. Lack of family consensus escalates the issue.

The planner’s loyalty stems from her bond with the sister-in-law. She fears disrupting her healing. The girlfriend feels rejected, worried about her daughter’s sense of belonging. The brother’s silence suggests avoidance. All parties lack open dialogue, deepening the rift. The daughter’s exclusion risks emotional harm, though unintended.

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Family therapist Dr. Susan Heitler states, “Clear boundaries and honest conversations prevent family conflicts from festering” (Psychology Today, 2023). This applies here—unaddressed feelings perpetuate division. The planner’s choice protects one side but alienates another.

Host a family meeting to discuss boundaries. Invite the daughter, not the girlfriend, to foster sibling bonds. Encourage the brother to mediate. Regular check-ins can rebuild trust.

Here’s the feedback from the Reddit community:

Social media users weighed in passionately on the family vacation dispute. Opinions split into support for the planner, criticism of all parties, and calls for fairness to the child.

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Many supported excluding the girlfriend, citing her role in the affair.

ClaDash − For clarity - your brother’s mistress is upset because she and her daughters are not included to events of the family whose marriage she broke up? 😂🤣😂. YNTA.

ProfPlumDidIt − NTA. I personally would invite ONLY the wife and kids and tell your brother to gtfo.

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OddReputation3765 − NTA 👍🏻 my partner just cheated and I wish my brother in law was as awesome as you.

Designer_Button1968 − NTA. It’s an unfortunate situation but I don’t think you owe anything to his girlfriends daughter considering the circumstance. In a perfect work, no, the child shouldn’t be...

But that’s just not how it is. Your brother & his girlfriend both need to accept the consequences of their actions. It sucks that it affects their daughter, but that’s...

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OrangeCubit − NTA - I wouldn’t want to hang out with the mistress either.

NewfromNY − NTA. Invite whomever you want. If your brother does not come, his decision.

JoeCensored − NTA - I'd give the opposite answer if your brother had divorced, and remarried the GF. But your brother has so far not chosen to do so.

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If you talk to the GF again about this I'd tell her you can't invite both your brother's wife and GF, so wife wins. If it were a choice between...

perfectpomelo3 − NTA. Why would you make your SIL uncomfortable just to appease a woman who chose to f__k a married man? Dollars to donuts she wants to go to...

gurlwithdragontat2 − NTA - she chose how she entered this family. She got with a married man, held his hand as he blew up his life, and now wants acceptance....

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Why should her kid come before his others and make them uncomfortable by bringing his mistress on the trip? ? Hell no. She can plan a family vacation with the...

[Reddit User] − NTA. You're doing the planning here. Not to excuse your brothers cheating behavior but she shouldn't have slept with a married man. Let the girlfriend plan her...

Some questioned the exclusion of the daughter, urging fairness.

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Lullayable − Wait, is she still the girlfriend? Is he still married with a GF on the side ? ? Pls tell me I read that wrong. ~~You're NTA. Your...

Your brother sucks for expecting to keep his wife and his side piece and for staying in BOTH relationships despite his wife wanting a divorce. Your SIL sucks for allowing...

The side piece sucks for expecting to be accepted by the family after she broke up a marriage like the homewrecker she is. You suck for pushing responsibility on a...

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Unfortunately, I understand why you don't want to have a relationship with her but you're going to have to include her in your family gatherings.

You, however, don't have to include the mistress in your gatherings and if she gives you an ultimatum of "if I don't come, she can't come" (she sounds like she...

Also, I'd like to note that your SIL not going through with the divorce also means that she's accepted her husband's infidelity and is willing to "work things out". That...

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Edit : it does sound like I'm not blaming your brother for his actions in my previous edit. He's entirely responsible for this fucked up situation.

He is the one who cheated and he's the one who got someone pregnant outside of his marriage and he's the one who seems to get away unscathed in all...

he's keeping his side piece, he's even keeping his family since you don't even sound that angry at him,. .. Anyways, everyone sucks here but he sucks the most.

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Redkinn2 − NTA and ESH. Excluding the child is mean, she's still your brothers daughter and your parents grandchild. Plus her and her siblings should have a relationship at least...

Somewhat confused though. .. your brother is still with the GF? Then he and his ex need a divorce. And he should also be excluded along with side piece. If...

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Tyberious_ − NTA Question though, what if your brother wanted to bring just his daughter? Wouldn't change my judgement if your family says no to that as well but it...

A few sought clarity on the family dynamics.

Fluffy-Shelter-1258 − Info Sil stopped wanting a divorce. ..are they getting back together? ?

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AffectionateTruth147 − Info: does you brother want to reconcile with your sister-in-law and is he still with his girlfriend?

This story highlights the messy fallout of infidelity. The planner’s loyalty to her sister-in-law reflects family bonds but excludes a child caught in the crossfire. Choices have consequences, yet fairness to innocent children matters. Open discussions could ease tensions. Including the daughter, not the girlfriend, might balance compassion and boundaries. Families navigate pain differently, but communication is key.

Would you prioritize a wronged family member or include everyone for fairness? How can families heal when trust is broken?

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