Conflict arose when the OP became upset after finding her toddler had caused a large mess while the sister was supposed to be supervising. This led to an argument where the OP demanded the sister leave if she could not help more. Shortly after, the sister reported the OP to Child Protective Services (CPS), claiming the OP was overwhelmed and neglecting the children. The OP discovered the report was a deliberate act by her sister intended as a ‘prank’ and immediately demanded she vacate the premises. Now, with her husband supporting her decision but the rest of her family furious, the OP questions if she was too harsh in kicking her sister out.

I (30F) need to know if I’m being too harsh here because my family is completely divided.
My younger sister (26F) moved in with my husband (32M) and me about four months ago after she lost her job. We have a toddler and a baby, so it’s been hectic, but we wanted to help her get back on her feet.
She was supposed to stay for two months max while job hunting.
Here’s where it gets messy. Last week, I asked her to watch the kids for an hour while I ran to the pharmacy. When I got back, she was on her phone while my toddler had gotten into the pantry and made a huge mess with flour everywhere.
I’ll admit, I lost my temper and told her she needs to actually WATCH them when she agrees to babysit.
She got defensive and said I was being ungrateful for “free childcare” (reminder: she lives here rent-free). We argued, and I told her if she can’t do the bare minimum to help out, she needs to start looking for her own place.
Two days later, CPS showed up at my door. The worker said they received a report that I was “overwhelmed and potentially neglecting my children.” I was MORTIFIED. After they left (finding nothing wrong, obviously), my sister started laughing and said she called them to “teach me a lesson about being ungrateful” and that it was “just a prank.”
I told her to pack her stuff and get out. Now.
She’s been staying with our parents, who are FURIOUS with me. They say she made a stupid mistake but she’s family and I’m overreacting. They keep saying she was just stressed about being unemployed and lashed out.
My mom even said I’m “ruining her life” over a joke gone wrong.
My husband backs me 100% and says what she did was unforgivable. But now half my extended family isn’t speaking to me, and my mom calls daily crying about how I’m tearing the family apart.
My aunt even posted on Facebook about how “some people forget where they came from” (clearly about me).
The thing is, I keep second-guessing myself. She IS my sister, and she’s never done anything like this before. But I can’t get over the fact that she weaponized CPS against me. That’s not a joke.
That could have had serious consequences for my family.
AITA for kicking her out and refusing to let her come back?
Conclusion
The OP is currently facing significant emotional backlash from her extended family, who view her reaction as an overreaction to a foolish mistake made by her sister under stress. The core conflict centers on the OP’s need to establish firm boundaries against a severe breach of trust versus the family expectation that she should forgive a severe transgression because of their blood relationship.
The central question remains whether the weaponization of a state agency like CPS, regardless of the sister’s stated intent as a ‘prank,’ justifies an immediate and permanent exclusion from the home. Readers must weigh the severity of the action against the context of family support and potential for reconciliation.
Here’s how people reacted:
What she did was unforgivable. You gave her a gift worth hundreds or thousands of dollars. Rent is not cheap. And what did she do in return? She couldn’t be bothered to watch your kid, then she called CPS on you as a bonus. She invaded your privacy by sharing personal information and told malicious lies about you. At what point is she going to do a favor for you that is worth hundred or thousands of dollars, I wonder? I’m guessing – never.
What she did was criminal. Filing a false complaint costs the government time and resources. The government should sent her a huge hefty bill for that. That happens, sometimes, when people waste government resources. CPS is already understaffed, and the time and resources that were expended on her false accusation was *stolen* from the most vulnerable and needy – abused and neglected children. She also put your own child at risk. If there had been a misunderstanding, your kid could have ended up in foster care. It’s like dangling your kid out of a sixth story window! Any parent would understand the trauma her actions caused you, the terror at having your child put at risk, the horror at being unjustly accused, and the nagging fear that even though you’ve done everything right that you might still end up in a nightmare situation.
The fact that she could do that to her own sister, endanger your child, and also do that to such pitiful, miserable children who *need* CPS, and then *laugh* about it tells me that she’s the next best thing to a psychopath. She has no natural way to notice or care about the pain and harm she is causing to others. She is shallow, irresponsible, entitled, self-centered and callous. It is dangerous to have people like that around you. You don’t want to see what she’ll do as an encore. Certainly, never allow her into your house again. And if she is so comfortable with malicious lying and hurting people, it makes you wonder what else she does. I’d be counting the silverware and checking social media. There’s no telling what she’s saying about you publicly, now.
This has been a revelation about your sister’s character that I hope you take seriously. Don’t be lulled into complacency. She has revealed her true self to you. You should listen carefully to what she is telling you about herself. I’m sorry. You must be grieving for the sister you thought you had, after finding that person never existed and there’s only…. *this*.
I hope you’ve learned a valuable lesson. No matter how much they whine, beg and complain, no matter how their sob stories tug at your heartstrings – never let people move into your home rent free, and particularly not family.
And, BTW, the reason your parents are so furious with you is that since you booted her out of your house, now they have to put up with the witch they spawned, themselves. Family are always so willing to offer someone else’s services, and so angry when the responsibilities they tried to push onto someone else land on their own doorstep. Again, Reddit is filled with these stories. Newsflash – she’s *their* daughter. If she’s a mess and can’t support herself, that’s their responsibility, not yours. You weren’t just helping her, you were taking on your parents’ responsibilities. And the fact that your parents don’t understand that her actions have made it impossible to trust her or to allow her into your home, suggests where she might have gotten these tendencies from. It seems they are utterly clueless as to the seriousness, impact and malicious nature of this offense.
Sheesh! With family like that, who needs enemies?
Sister can go to hell. She’s messed up her life with her poor decisions, hates being called out for making more of them because I’m sure she “knows what’s she’s doing and she’s just going through a rough spot until ”. She’s spoiled. She doesn’t like to be told she’s wrong. God forbid, that’s clear. Probably been happening all her life… was she the golden child too?
Anyway, if Mommy thinks she’s so precious and so on, why was she living with you anyway? Why wasn’t she living with her to begin with? Strange. Or is it because your house is “nicer”? More fitting to her “standards”? Let her stay with Mommy. If Mommy wants to keep talking about “it was a just a joke” tell her that being on a permanent government watch list is not a joke. If she chooses to continue to be on sister’s side on this, she’s choosing to put her grandchildren in harms way by choosing a person who does not think through their choices very well. Because what if CPS had decided for some reason to take the kids? What then? Would it still be “just a joke”? ‘I didnt think they would do anything”? WOULD SHE HAVE EVEN CARED? I think not. She didn’t even care enough to make sure they didn’t harm themselves while you went to the store. (Thankfully it was only flour they got into, but what if had been something else because she wasn’t watching them?)
She doesn’t need to see the grandkids if she thinks their safety is “just a joke”.
But that’s me. I have no problem cutting people out of my life.
Also, your parents should have been hosting their daughter to begin with. She can sleep on their couch if they don’t have a guest bedroom. Why are they pawning her off on you and acting like you’re ruining her life for not letting her live with you rent free.
NTA. She deserved to be kicked out. Only a huge AH does that as a “joke” and it isn’t even funny.
She literally risked your children being taken from you!!!
I would never speak to her again. She’s not even sorry. She’s entitled and irresponsible.
The rest of the family are being delusional defending her.
The way your family is treating you is awful. I’m guessing your irresponsible jerk of a sister is the golden child.
I strongly dislike your sister and your family members defending her.
As a mandate reporter who has had to report great atrocities to an understaffed and overworked system, what she did is absolutely unforgivable.
I have zero idea how she could possibly think that was funny, especially since she’s living in your place rent free! She’s very lucky nothing came of it, and she deserves worse! Quite frankly, so do your family members who support her
Personally, I’d never let her in my house or near my children unsupervised again.
NTA
My own sister made a joke about calling CPS because I was struggling with my special needs child and I said if she ever considered doing that or saying it again would be the last time she ever saw me or her nephew.
She’s a spoiled brat and had no right. Your parents can keep her if they’re so concerned. Your children and spouse are your top priorities.
Your mother is wrong.
Freeloading spoiled brat should have been helping with babysitting, housework, whatever needed doing since she wasn’t paying rent or food.
That’s not a joke; that’s malicious.
NTA; she is, and she should be old enough to know better.
Your family’s reaction seems fairly skewed. I’d live with it, though. They’re wrong, not you.
Your mother is not much better. How is sending your sister to live with mom ruining your sister’s life.
They both need to get a grip.
NTA