AITA for not letting my pregnant sister live with me?

A young woman shared a difficult situation involving her pregnant sister and a long pattern of repeated conflicts. For years, her sister had been caught in a cycle with her boyfriend, repeatedly breaking up, moving out, seeking temporary shelter, and then quickly reconciling. Each time, she opened her home to help, offering emotional support and a place to stay despite growing frustration with the repeated pattern.

The situation reached a breaking point after one incident that left her feeling deeply disrespected. What followed was a firm decision to set boundaries about her living space and her role in her sister’s ongoing struggles. Now, with her sister six months pregnant and facing housing uncertainty again, the earlier decision has become the center of family tension. Relatives and the sister herself argue she should help, while she insists the repeated cycle forced her to draw a permanent line.

‘AITA for not letting my pregnant sister live with me?’

She described the repeated pattern of her sister moving in after fights.

I (22f) live in a 2 bed apartment. my sister (26) is 6 months pregnant & lives with her boyfriend. long story short – her boyfriend is an a__hole. my...

every time it's the same story– they fight/breakup, he kicks her out, she moves in with me, we talk about her relationship & future (she says she's not getting back...

and then within a few days she is speaking to him again and then within another few days living with him again. rinse and repeat.

She explained the incident that made her refuse future stays.

well, the last time it happened was my last straw. i was going holiday with friends for a 10 days but 3 days before i was meant to leave my...

they've broken up again but this time it seems permanent. i comfort her for the 3 days and even offer to not go on vacation and she and i can...

so i do. when i leave she's still heartbroken and i still feel pretty guilty but i've saved up for this holiday for a while and probably won't get the...

when i arrive home my apartment is a state. dishes piled up everywhere, rubbish all over the place, laundry in every room, etc.

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it was filthy and i was angry. i run up to the spare room i let my sister use and find her and her boyfriend in bed. the boyfriend that...

i never gave her permission to let him into my home because i don't like him and i don't want him there. at this point, i'm angry but i've also...

i calmly tell her to pack her stuff and both of them to get out. they left with some fuss and didn't offer to clean or anything.

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the next day she comes round to get some of her stuff and i tell her that she's no longer welcome to stay in my home. she can visit during...

she took an attitude and said she didn't care. fine, whatever. she wants to treat me and my home with that level of disrespect then i don't have to go...

She described the current situation with her sister pregnant and homeless again.

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so, when she got pregnant my family basically reiterated to her that her bf is not a good guy and she's leaving herself financially vulnerable by not getting her own...

nothing is stopping her getting her own place – she's just too lazy and wants everything handed to her. well, i reiterated to her that if she wants to stay...

she gets mad, says she doesn't need me anyway, etc. but i repeat it, making myself very clear. that brings us to now: she's 6 months pregnant, bf has kicked...

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(parents don't have the room for her or a baby, nvm both). i've repeated my stance from before and now she's calling me an ah. aita?

This situation illustrates the complex balance between family loyalty and personal boundaries. Repeated cycles of crisis and reconciliation can place significant emotional strain on those offering support, especially when the underlying behavior does not change. Over time, individuals providing help may feel that their efforts enable patterns rather than resolve them.

From one perspective, the sister’s situation is deeply challenging, particularly during pregnancy, when stability and support are crucial. Family members often feel moral or cultural pressure to step in during vulnerable periods, even when past experiences have been negative. Some may argue that refusing help during such a time could worsen long-term family relationships or lead to greater hardship.

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On the other hand, consistent boundary setting can be essential for maintaining personal wellbeing and preventing ongoing cycles of dependency. When repeated trust violations occur, individuals may reasonably choose to protect their living environment and emotional stability. In cases like this, the broader issue often lies not in a single decision but in long-standing patterns of behavior, communication breakdown, and differing expectations about responsibility within family relationships.

These are the responses from Reddit users:

Many commenters strongly supported her decision, stressing repeated warnings and broken trust.

laughingsbetter − NTA - of course not. You gave her warning. She will need to hit rock bottom to change things. Stay strong.

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[Reddit User] − NTA She broke your trust, don’t set yourself on fire to keep her warm

femme_enby − NTA You stated your boundaries, and the expectations. She disrespected your home when you had been incredibly generous. She makes the same choices time after time… what’s the...

The definition of insanity is doing the same thing over and over while expecting a different outcome? Or something like that. She chooses to stay in this unhealthy and unsteady...

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She chose to keep the pregnancy. She will probably choose to keep the child and subject it to this toxic environment and hectic back-and-forth nonsense, ESPECIALLY if she feels like...

Stand your ground. If you so choose, it would even be kind to explain how their current relationship with the regular fighting and separating and making up is highly unhealthy...

and would be even worse for a small child, if she so chooses to keep the child AND stay in the relationship, and that you will not be a part...

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[Reddit User] − NTA: Your sister sounds rude and delusional. She knows you don’t like her BF but still invited him over while you were on vacation and ignored the...

Can you imagine the mess she will make if you allow her and a baby to stay? She will use the baby as an excuse and you will become a...

If she is on the verge of being homeless I’m sure your parents would make room for her, but they and you probably expect her to get back with her...

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Hopefully she will realize you are no longer her safety net and that she needs to get her s__t together.

Lola_M1224 − NTA and I do hope you've changed your locks if she's ever had a key.

Others focused on practical concerns about long-term consequences if she moved in.

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LuvMeLongThyme − If you let her come back, you will *never* get her out. Not without getting the law involved, anyway. She made her bed-she can lie in it. NTA

redheadjd − NTA. If you were to let her in now, you're not just going to be a roommate. You're going to be a **provider** for her and her baby.

When she's short of cash, she'll come to you. When she needs someone to watch the baby "just for a minute" but she stays gone for hours, you again.

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When she needs diapers, formula, etc and doesn't have the money, she's going to be looking at YOU. The mess she made with her BF is nothing compared to the...

And believe it or not, the above is the best case scenario. There's yet another option - she gets back with BF and he moves in.

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One day you'll leave for work, and when you get home, he's there with all his stuff. Telling you that he has a right to be with the mother of...

she'll cry and cry and tell you how horrible you are that you're keeping them from being a true family. It's your home, and you deserve to be comfortable in...

You deserve quiet, privacy, peace of mind. Just. Say. No. And anyone who contacts you to tell you you're an AH for not letting your sister stay - tell them...

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aaliceb − NTA. You told her repeatedly what would happen, and it happened. If nothing is stopping her, she can get a new place. When the baby comes she'll be...

Some comments added lighter or indirect observations about the situation.

ittybittydittycom − NTA - she disrespected you by bringing in her boyfriend and messing up your place. If she was respectful then I could have said TA.

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But she wasn’t and she is not your responsibility. She needs to learn to depend on herself and probably seek counseling as it seems she isn’t in a healthy relationship.

TyphoidMary234 − NTA, I’m sure they are domestic violence centres where she can stay. You can’t help someone who won’t help themselves unfortunately, even if they are family.

This story highlights how repeated patterns of behavior can strain even close family relationships. While the sister faces a vulnerable situation, the younger sibling’s decision reflects years of broken trust and emotional exhaustion. The conflict ultimately comes down to balancing compassion with self-protection and determining where responsibility truly lies.

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It also raises broader questions about family obligations and personal limits. How much support should someone provide when patterns keep repeating? Is it possible to help a loved one without enabling harmful cycles? Where should the line be drawn between empathy and protecting one’s own stability?

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