AITA for not sharing my car with my stepbrother?

A shiny new car, a gift from a loving dad, sits in the driveway, gleaming with promise—until it vanishes. For a 17-year-old, this isn’t just a car; it’s a symbol of independence, a ticket to freedom. But when their mother hands the keys to a reckless stepbrother without a word, chaos ensues. The car returns battered, and tensions flare in a blended family already navigating delicate bonds.

The situation spirals as the mother insists on an “alternate days” policy, despite the stepbrother’s crash-prone history. With the stepfather stepping in and emotions running high, this tale of boundaries, trust, and family loyalty unfolds, leaving readers wondering: who’s really in the wrong here?

‘AITA for not sharing my car with my stepbrother?’

My parents are divorced but cordial. My mother married my stepdad when I was 11. I have a stepbrother who is my age and a half brother who is 4. My dad recently brought me a new car for my birthday. My brother also had bought a car which he bought with his money, it was second hand but in good condition.

Just a few days after I got my car he had a crash in which his car was severely damaged. This was not the first time he was reckless with a car, earlier he had almost crashed his father's car as well with me in the backseat and his father in the front. It is one of the reasons my stepdad refused to buy him a car.

A few days backwhen I returned from my friend's house who lived nearby I saw my car gone from the driveway. I immediately ran into the house and started looking asking my mom and stepdad about it. My stepdad looked bewildered but my mom calmly got up from her seat and told me she had given my car to my stepbrother to go visit his friends who live quite some distance away.

I started to panic and asked her why she would do that. She simply said it's what siblings do and from then on me and my stepbrother could use the car on alternate days. By this point my stepdad had come over to us and told her she shouldn't have done it without my permission.

He told her if anything happened to the car then she would have to pay. She agreed. Well, my somethingdid happen. Stepbrother crashed the car,hood, headlights and airbags needed to replaced. I informed my father about this and after assessing the damage he learning what led to this, he immediately said either stepbrother or mother has to pay for part of the repair cost which the insurance doesn't cover.

My mother tried to negotiate but he wouldn't budge. She asked stepdad and he wouldn't help either so she had to give the money from her savings. Yesterday, after the car had come back form the mechanic, she came to me and asked for my car keys. I asked what was up and she reminded me of the alternative day policy.

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I told her she was out of her mind to even think that I would share the car with my stepbrother after all this but she just said she had promised stepbrother his share of days and that is also the reason she had the car repaired so both of us could use it. I took the car keys and locked the door of my room.

She then called me ungrateful. My stepbrother said I was depriving him of meeting his friends and he was suffering. My stepdad later came and put stop to it. The only reason I think I might me the a**hole is because I know my stepbrother wasn't lying about his mental health issues, he has had to see a therapist because of it.

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Hos friends have been really helpful in his struggle with his mental health. And my mother did say she would pay for the damages. So, I don't know, should I just give my stepbrother another chance? AITA? Also, I did offer to drive my brother to his friends but he straight up refused saying it would embarrass him..

UPDATE Okay, so thank you all for taking the time to comment and the awards. So there have been a few major revelations since my last post. Firstly I called up dad so he could convince mom not to pressure me into giving the car to my stepbro.

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Dad told mom it was wrong of her to expect me to share my car (which is in dad's name btw, will be transferred to me when I turn 18) when my stepbrother has time and again proved that his driving skills cannot be trusted (the call was on speaker so I heard it all). She resisted at first but said okay.

When the call ended, she told me that we need to clear some things out. I honestly thought she was going to pressure me again but instead she started crying and said that the main reason she wanted him to drive a car was because he was extremely nervous about driving ( his mother passed away in a car accident).

Some of his classmates had badly bullied him about it and mom had seen him crying one day, shaking and panicking. She had promised him that he would drive a car without any nervousness so basically she would just let him crash cars until he didn't anymore. I personally think this is a highly inappropriate approach to the issue and expressed it to her.

She said she understood now but she was too emotionally attached to the issue (I already knew she had been bullied a lot during her high school years as well). She said my brother had confided in her that he feared his new (good) friends would humiliate him like the bullies if they found out he couldn't drive properly (also the reason behind not letting me drive him or taking an uber).

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I was shocked. I knew that he was dealing with mental health issues but not that it was this bad. I asked her if stepdad knew. She said no, and stepdad thought he shouldn't drive because of his late wife's death in a similar manner. She told me that he has panic attacks everytime stepbrother crashed a car ( I have never seen him get the news of any of his car crashes so I didn't know) and that stepbro felt ashamed.

I said she probably should tell him why stepbro keeps trying to drive. She agreed they had (I assume) a long conversation with voices rising high. I guess they were not on speaking terms because both were being cold to each other ever since and stepdad slept on the couch last night.

I guess stepdad had a talk to with stepbro because he apologized to me today. I forgave him and he also agreed to my offer of driving him and we will go over to his friend's place later today. The only thing I'm concerned about is my mom and stepdad's rift. She has been cold to everyone and stepdad is not speaking to her and but is still friendly with me.

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Things were pretty awkward at the breakfast table today. While I'm happy that stepbro's issues got addressed in a positive way, I think I just ruined my mom's marriage. For those of you asking stepbro refused to drive mom's car because it is the same model as the one his mother passed away in.. Also, me and stepbro are 17.

Family dynamics in blended households can feel like navigating a bumper car arena—everyone’s got their own steering wheel, but collisions are inevitable. This Reddit user’s clash with their mother and stepbrother highlights a classic boundary issue. The mother’s decision to lend the car without consent dismisses the OP’s autonomy, while the stepbrother’s driving mishaps raise safety concerns. According to Dr. John Gottman, a renowned family therapist, “Respecting boundaries is crucial for healthy relationships, especially in blended families where trust is still forming” (Gottman Institute).

The mother’s push for shared use, despite the stepbrother’s mental health struggles and crash history, reflects a deeper issue: enabling versus supporting. Her emotional tie to her stepson’s trauma—stemming from his mother’s fatal car accident—clouds her judgment, prioritizing his needs over fairness. Meanwhile, the stepbrother’s refusal to accept rides due to embarrassment suggests pride over practicality, complicating the family dynamic.

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This scenario mirrors broader issues in blended families, where 40% of remarried couples face boundary conflicts, per a 2021 study by the American Psychological Association (APA). Dr. Gottman’s advice emphasizes clear communication: “Set explicit agreements to avoid resentment.” The OP’s offer to drive their stepbrother was a practical solution, but the mother’s insistence on unsupervised driving risks further harm.

For resolution, the family could benefit from open dialogue, perhaps facilitated by a therapist, to address the stepbrother’s driving anxiety and the mother’s overcompensation. Setting firm boundaries—such as no car access until driving skills improve—protects everyone while fostering respect.

Here’s the comments of Reddit users:

Reddit’s hot takes are in, and they’re as spicy as a tailgate barbecue! The community weighed in with candid, colorful opinions on this family feud:

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pinson3355 − NTA. Apparently, he's more concerned with his embarrassment than his mental health issues.. Tell him to uber.

Shor2y − NTA She can let him use her car if it's so important for him to drive.

DigDugDogDun − NTA. Thank goodness you have someone on your side in your house! Your mom is the biggest AH here. On top of being illogical and unfair, does she not care who gets killed or hurt as a result of stepbrother’s reckless driving?

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The stepbrother is also an a**hole for crashing so many cars. If this is truly caused by mental health issues, that’s not an excuse to keep crashing cars, it’s a reason to take away his car keys for the foreseeable time being until he gets this under control, if ever.

And what does your family’s car insurance company have to say about this? Your rates must have gone through the roof by now and at some point it’s possible they’ll just declare him uninsurable. It’s very generous to offer to give your stepbrother rides to see his friends, him refusing out of embarrassment pushes him well into AH territory.

berry120 − Massive NTA. No two ways about it, your mother is being completely unreasonable, and enabling your stepbrother's awful, entitled behaviour.

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Algebralovr − NTA Your brother has wrecked 3 cars to date. Your stepfather, who it sounds like is HIS father is not supportive of a car for him,so why is your mother bed ding over backwards for him? This is weird. Your stepbrother needs to get job and pay for his own car, particularly since he has now had 3 wrecks. Honestly, I’m surprised the insurance company will even insure him!

Jazzlike_Humor3340 − NTA If your mother wants your stepbrother to drive someone's car, she can loan her own. Expecting you to keep loaning your car, when he's already crashed it once, is ridiculous.. I'm glad your stepfather and father seem to be sensible on this issue, even if your mother isn't.

For information, are you over 18? And whose name is the car registered in? Yours, your father, your mother? That makes a difference, legally, as to whether you can/should report it stolen if your mother and stepbrother manage to get the keys.

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ETA you can always tell your mother you will only consider loaning your car again once your stepbrother has driven her car at least every other day for two years without an accident. If she isn't comfortable with that risk for her own car, it isn't fair for her to ask it of you.

ETA2 Also, your stepbrother might need a medical check. 3 accidents in a short time isn't normal. He may have vision issues, or tiny seizures that affect his attention momentarily, or something else going on. It would be very unfortunate if a treatable medical condition was handled as a moral failing, and he was left in possible danger to himself or others.

Janetaz18 − NTA. Don’t give in to them. Hide your keys and never leave them at home if you go somewhere and leave the car in the driveway. If you come home and find it missing call the police and report it stolen. And tell them that you are going to do that if the car comes up missing again.

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Since it doesn’t belong to her she can’t let your stepbrother borrow it. She doesn’t have that authority. And if you have a good relationship with your father and he’s willing, I would consider moving in with him. Your mother is an AH. Good for your stepfather for siding with you and making her pay for the damages.

leroyjz − NTA. Uber can be his friend.

eirwen29 − NTA. he's proven time and again that he cannot be trusted with vehicles, especially one that is yours. In your name. In my province, it affects the owner's insurance, not necessarily the one who is driving, causing your rates to go up. I would never let him touch my car if it was me in that situation - even if he didn't have a track record.

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OpenImagination9 − Don’t loan him the car … the little s**t will wreck it immediately.

These Reddit quips are fiery, but do they hit the road or spin out? One thing’s clear: the crowd’s leaning hard on boundaries and accountability.

This tale of a car, a crash, and a family rift leaves us pondering loyalty, trust, and the cost of enabling. The OP stood their ground, backed by their dad and stepdad, but the stepbrother’s mental health struggles add a layer of complexity. What would you do if your prized possession was handed off without your say? Share your thoughts—have you faced a similar family tug-of-war? Let’s keep the conversation rolling!

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