AITA for putting child-proof locks on the stove to stop my adult sister from using it?

A 19-year-old college student, living with her 20-year-old stepsister Nicole in a shared apartment, installed child-proof locks on the stove and oven after Nicole repeatedly forgot to turn them off, nearly causing two house fires. Despite reminders and sticky notes, Nicole dismissed the concerns and became angry when confronted, prompting the drastic safety measure. Nicole reacted furiously, calling her a control freak and leaving for a friend’s place, while their parents urged reconciliation. The woman wonders if she’s wrong for prioritizing safety over her sister’s autonomy.

This fiery roommate dispute has ignited a passionate online debate, with most supporting the woman’s safety concerns and criticizing Nicole’s recklessness. Was she wrong to child-proof the stove? Let’s dive into the story, the sisterly dynamics, and the community’s perspective.

‘AITA for putting child-proof locks on the stove to stop my adult sister from using it?’

The conflict arose from shared living arrangements:

I (f19) live with my stepsister Nicole (f20). We live together in a small two bedroom apartment whilst we both attend the same college. Our hometown is a small rural...

My dad married Nicole's mother around 11 years ago. Nicole and I know each other pretty well and have spent a lot of time together. We haven't always gotten along...

Nicole’s dangerous cooking habits emerged:

So me and Nicole both got sick of dorms and moved in together around two months ago. Back at home, Nicole never cooked for herself (not beyond microwave meals, anyway)...

Nicole keeps "forgetting" to turn off the stove or oven when she's finished with them. At one point, this nearly caused a full-blown house fire when she forgot about the...

Efforts to address the issue failed:

I kept gently reminding Nicole to turn off the oven/stove when she's done with them but she just doesn't seem to listen. I even tried putting sticky notes around the...

Eventually, Nicole got irritated with the reminders and told me I'm treating her like a child. I said I'm sorry if it came off that way but she needs to...

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The problem has just kept persisting and a near miss with a house fire happened again when Nicole forgot about the stove, and she didn't hear the smoke detector because...

The child-proof locks were a last resort:

I tried to have a talk with Nicole and told her this needs to stop. Nicole just got mad before I could even suggest anything and told me to get...

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This has started to make me really anxious, especially when Nicole is home whilst I'm out. I bought some plastic child locks for the knobs that control the stove and...

This way, she can't use the stove or oven when I'm out of the home. When I'm home, I can make sure nothing bad happens. Me and Nicole have similar...

Nicole’s reaction escalated the conflict:

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Nicole went apeshit when she noticed them, and started screaming at me and told me I'm a control freak and bullying her. I yelled back at her and told her...

She's now gone to a friend's place and has blocked my phone number. My dad and stepmother got concerned after getting texts off Nicole and they keep messaging me about...

This situation underscores the tension between ensuring safety and respecting a roommate’s autonomy, particularly in a shared living space with family. The woman’s decision to install child-proof locks on the stove is a reasonable response to Nicole’s dangerous behavior, as two near-fire incidents pose a serious threat to their safety and property. Nicole’s dismissal of the issue and refusal to engage in constructive dialogue left few options, and the locks, while unconventional, address the immediate risk when the woman is not home to supervise.

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Psychologist Dr. Robert Firestone notes, “In shared living, safety concerns must override individual preferences when life-threatening risks are involved” (The Self Under Siege, 2012). While the locks may feel condescending, they were a last resort after gentler methods (reminders, sticky notes) failed. Nicole’s extreme reaction and refusal to acknowledge the danger suggest deeper issues, possibly inattention or denial, which could benefit from professional evaluation, as some Redditors speculated about ADHD or other conditions. The woman’s approach could have been softened by discussing the locks beforehand, framing them as a temporary safety measure until Nicole demonstrates responsibility.

Moving forward, the woman should reach out to Nicole (possibly through their parents) to apologize for the delivery but reaffirm the safety concerns, proposing a plan for Nicole to regain stove access by proving she can turn it off consistently. Exploring alternative living arrangements or involving a mediator (like a counselor) could prevent further escalation. Your past discussions about setting boundaries, like refusing to cover others’ responsibilities or managing risky behaviors, suggest you value safety, so prioritizing it here while seeking reconciliation aligns with that.

Take a look at the comments from fellow users:

The Reddit community overwhelmingly labeled the woman NTA, praising her for prioritizing safety and criticizing Nicole’s reckless behavior, with some suggesting moving out or seeking professional help for Nicole.

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Many supported the safety measure:

EvoAnubisX − Dude, she’s 20 years old and literally child-proofing the oven works! ? I’m freaking dying! My buddy tried to child proof their refrigerator to stop their nine year...

Oh, right. You’re NTA in the slightest. Left unchecked your stepsis is seriously fixing to burn the place down and seriously doesn’t seem to be bothered by that fact. Not...

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Nitro114 − NTA She nearly burnt down the house twice. Thats two times too many, espcecially when something as simple as turning off the stove is involved

myfoust − NTA You are treating her like a child- because she’s acting as irresponsible as one. This isn’t a little issue like leaving lights on or not keeping the...

She’s too irresponsible to be using a stove If she wants to be treated like a normal adult who’s free to cook whenever she wants- then she needs to get...

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RickGrimesSays − NTA. Call me overdramatic, but I rather have an angry sister than losing my life or home.

808Gemma − NTA. You do not mess with fire, she already had two close calls, you may not catch the third. I would prefer she get mad at you rather...

She can move out and burn down her own home. If she can’t understand why the stove is a serious matter, she doesn’t get the privilege of using one.

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Others emphasized the danger of fires:

Alamoraine − Two times she almost burns down the house, one time where she didn’t hear the smoke detectors, and she wonders why you’re this nervous with her using the...

NJtoOx − Wait. You bought child locks to stop a twenty year old woman and it worked? I’m blown away. She’s twenty and can’t open a child lock? ? That’s...

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Habitually leaving the stove on and starting multiple house fires is dangerous and honestly most children know better than that. She’s a danger to herself, you, your house, and all...

Tell your dad and stepmom that you are not going to sit back and just allow her to burn your house down. What if you were asleep and hadn’t heard...

My dad was a firefighter and I’ve seen first hand the damage stove/oven fires can do. House fires are dangerous and to have someone with such disregard for safety living...

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At some point she will figure out how to get them off or do something else equally dangerous (metal in the microwave? the toaster? ) and you will pay the...

Move out. If you can’t right now then you need to get insurance and be on alert at all times. Buy a fire blanket and make sure your fire extinguisher...

[Reddit User] − NTA she nearly Burnt the apartment down twice and doesn’t even seem fazed

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Some suggested Nicole needs help:

cleaningmama − Nicole... doesn’t sound like a functioning adult. A child lock can stop her? She leaves the stove on multiple times? She didn’t hear the smoke detector because of...

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She talks over you when there is an important conversation? This sounds like a much bigger issue than a conversation is going to work out. She needs evaluation by a...

This is beyond Reddit’s pay grade. You’ve been trying to keep the house form burning down, so while a child lock would normally be a controlling AH move, in this...

Rucio − NTA Her actions are dangerous and actually threatening your property and your life. She needs to see a psychiatrist to see about getting ADHD meds. It sounds like...

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Others recommended alternative solutions:

BeadedRainbow − NTA. Nicole is an i__ot and has proven herself unable to be trusted to use a stove on her own. What does she expect you to do? Ignore...

Personally, I would have kicked her out and found another roommate rather than putting safety locks on the stove. But either way, the main concern is avoiding your place being...

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clutteredshovel − NTA. This is a tough situation as you are doing something that seems wildly condescending without context. But you can’t just let someone burn the damn place down...

If your/her parents give you any flack, tell them they should have raised her well enough to know how to turn the stove off. That’s some really bad parenting right...

wordsmythy − NTA Tell your parents she nearly burned the house down twice (BTW... leaving a PAPER PLATE on a burner? ??) You’re simply trying to keep her and yourself...

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BTW...I would never able to sleep knowing she could start cooking in the middle of the night. Safety first. (Maybe get her a Smokey the Bear poster... “Only YOU can...

Some highlighted Nicole’s irresponsibility:

slendermanismydad − My dad and stepmother got concerned after getting texts off Nicole and they keep messaging me about it, telling me I need to get Nicole to come back....

JOKERS_PISTOL − NTA if she insists on acting like a child then she gets treated like on ( she’s is a danger to herself and other people how is she...

The woman’s decision to install child-proof locks on the stove was widely supported by the Reddit community, who labeled her NTA for prioritizing safety after her stepsister’s reckless behavior nearly caused two fires.

They criticized Nicole’s irresponsibility and suggested professional help or a new roommate, urging the woman to stand firm. What do you think? Was she wrong to child-proof the stove, or was her safety measure justified? Share your thoughts!

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