AITA for refusing to let my sister use my PC for school work after she wet herself in my room?

Imagine a university student’s bedroom, their prized PC glowing with the hum of a hard-earned gaming setup, now tainted by an unthinkable mishap. Their 12-year-old sister, trusted to use the computer for online school, let a game override basic instincts, leaving a soaked chair and a furious sibling. What started as a generous loan of tech turned into a family showdown, with parents pleading for leniency and the student standing firm on principle.

The scene reeks of frustration—literally and figuratively—as the student grapples with a ruined chair and a sister’s carelessness. The parents’ push to keep the PC accessible for schoolwork clashes with the student’s need for respect and boundaries. Readers might feel the cringe of secondhand embarrassment, wondering if a kid’s mistake warrants such a hard line. This tale of tech, trust, and teenage blunders asks where responsibility begins in a shared home.

‘AITA for refusing to let my sister use my PC for school work after she wet herself in my room?’

My sister (12f) is doing school online and my computer is the only machine in the house capable of doing this (we have a laptop but it's no more use than a paperweight). I agreed with her and my parents that she can do her work on my pc and use it for connect to her classes. I also let her use it so she can play some games on my pc after she has done her work, stuff like Minecraft and Fortnite.

Today after she had done her work she was playing a game on the PC and when I walked in my room it was obvious she really needed to use the toilet. I told her to go to the bathroom but she said she couldn't until she had finished the game she was playing (it was something online that lasted ike 20 more minutes).

By the time she had finished the game someone else in the house had decided to go have a shower so she was waiting in my room. When I went to tell her the bathroom was free I found she was wetting herself all over my computer seat and the floor.

I've never been more furious and told her she was banned from using my computer again. My parents, although also angry at her, are now annoyed at me because she has no way of doing her work without them spending money they don't really have on a laptop for her.

This has led to a debate tonight where they were accusing me of being unreasonable. They said I should just ban her from playing games on the PC not school work but my argument was that she's 12 years old, not 6, and its unacceptable she should get to a state where she's pissing herself in my room so she can't be in here anymore.

EDIT: I should probably clarify as people are asking, the PC is one I bought using a part time job. I'm at University but currently at home so I also need the PC for work both now and when I go back.

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A 12-year-old peeing on a chair over a game sounds like a sitcom gone wrong, but it’s a real lesson in responsibility. Dr. Tovah Klein, a child psychologist , notes, “Preteens are capable of prioritizing basic needs over impulses, but gaming can hijack their decision-making.” The sister’s choice to keep playing despite urgency shows a lapse in maturity, not a medical issue, justifying the student’s frustration.

The student’s PC, bought with their own money, isn’t just a tool—it’s a symbol of their hard work. Banning the sister protects their property, but the parents’ concern about school access highlights a broader issue: resource scarcity in families. A 2022 study from Education Week found 30% of low-income households lack adequate devices for online learning, putting pressure on shared tech like this PC.

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Klein suggests, “Set clear rules for shared resources.” The student could allow supervised school use while banning games, ensuring education continues without rewarding carelessness. Parents should explore school-provided devices, as many districts offer loans .

Here’s what Redditors had to say:

The Reddit gang rolled in like a cleanup crew, dishing out sympathy and snark for this messy situation. Here’s the raw take, dripping with support and a dash of cringe:

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YeetusDeletus-Feetus − NTA. yeah, no excuse for a 12 year old to p**s themselves because they didn't wanna go to the bathroom. it's her fault, and she gets punished for it. it's not your problem anymore.

[Reddit User] − NTA. 12 is FAR old enough to know to stop a video game to go to the bathroom instead of peeing at your sisters computer

Xenavire − NTA, the fact she cared more about playing than peeing means she isn't actually mature enough to be trusted with your things. And even when the game ended, she didn't leave your room (she had every opportunity to leave and pee literally anywhere else, she's 12 not 2.)

It's absolutely not unreasonable to expect her to be more respectful and responsible at 12. (Seriously, even quitting an online game to use the toilet is a totally normal and adult decision to make, and I say this as someone with IBS - I've had to randomly leave games in the past, even if I didn't need to go when I started. She would have had significantly more warning, unless she has bladder issues.)

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Kitsumekat − NTA. She pissed on your stuff because she couldn't just go to the bathroom.. Now, you have the pissy seat and paranoia about her doing it again.

oldforgottenhall − NTA. Your sister's school very likely has devices available to loan out and she should be getting one of those.

Casereht − NTA but I am dying of secondhand embarrassment here because this same exact thing happened to me at 12 - in front of my crush - while playing Mario Kart. If it's any consolation, she definitely won't make that mistake again. And she will probably still wake up at night cringing in 24 or so years.

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VonShtupp − Cant they get a laptop from her school?

Brionneiscutest − NTA. Your parents just not providing a way to do school shouldn't have been the decision in the first place. Is the school not providing technology?

raerae6672 − NTA She is 12. Not 2. It was not important for her to finish that game. It is her mistake and you are right to not let her use your computer. Your parents need to ask the school for a laptop provided by them or they need to purchase one.

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For a 12 year-old girl to be so irresponsible to do this is simply out of order. You now how to sanitize the seat and the floor where this occurred. She could have gone to another room instead of waiting and doing this in your room once the bathroom was occupied. Your parents are wrong and she should know better.

EasyBreezyy405 − Info: Is the school not giving out devices to do online school?

Redditors backed the student, slamming the sister’s game-obsessed blunder as inexcusable at 12. Some urged exploring school tech options; others shared their own mortifying mishaps. But do these takes clean up the whole mess, or just add to the family drama?

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This student’s stand over a ruined chair highlights the messy clash of family trust and personal boundaries. Their sister’s carelessness turned a shared PC into a battleground, leaving parents caught in the crossfire. It’s a reminder that even preteens face consequences, but families must find practical fixes—like school tech loans—to move forward. What would you do if a sibling’s mistake trashed your prized possession? Share your thoughts—how do you balance discipline and family needs?

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