17-year-old sister left furious after her 23-year-old brother's girlfriend keeps wearing her clothes without permission, brother claims it's a hassle to make her pack more, their mother refuses to get involved: 'I told him it made me uncomfortable'

Emma Saven

Aug 5, 2025 6:00 PM EDT

It's natural girl-code to let a 'sister' in need borrow your things.

Whether it be clothes, make up or even a hairbrush, most girls are generally quite generous. However, that does not always mean that there is this unspoken entitlement to other people's possessions simply down to the rules of sisterhood.

Another thing, if someone says yes once or twice to lending their items, unless you've literally grown up together, it doesn't mean that you are forever granted access to whatever you desire, especially if you aren't quite there yet.

So this generous sister is fed up after days of seeing her brother's girlfriend walk around covered from head to toe in her clothing. Yes, she said on day one she could borrow a T-shirt…but this is one step too far, even the silent laws of sisterhood would gasp!

Okay, girl! If you're too lazy to pack a bag or are even just a pretty useless planner, then ask your boyfriend for some tracks, but you can't just walk around the house like you own whatever's inside.

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So how does one tiptoe around this situation without making the house a place of deafening tension?
She's tried talking to her mother, but that backfired. She's tried talking to her brother, but shocker, he just didn't see the issue. So maybe, the only person left to confront is his oblivious girlfriend directly…
Because without boundaries, first it starts with his sister’s Brandy sweater, but the next thing you know, she’s driving his dad’s Audi and facetiming his mom’s therapist!
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AITA for saying it's inappropriate that my brother’s girlfriend keeps wearing my clothes?

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