Woman kicks out her sister, Amelia, and 5 friends after discovering Amelia has been using her apartment for parties and telling everyone it's her home

Giving your sister a spare key for emergencies is a generous thing to do, and it works out great right up until she starts telling people at parties that your apartment is hers.

Woman dancing with headphones on in a modern apartment bedroom and kitchen area.

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AITA for kicking everyone out after my sister lied and said my apartment was hers?

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I (23F) live alone in a decently nice apartment, and i’m proud of it. My sister, “Amelia” (20F) lives at home, we’ve always been very close so I gave her a key for convenience and emergencies.

Since I moved in about 10 months ago, Amelia has been coming over a lot. At first it was nice, but now it’s almost daily. I work long hours and value my space and privacy, so this has been a little frustrating for a while, but I tried to be understanding because I know she really wants to move out too.

Over the past 2-3 months, Amelia’s been obsessed with my apartment and its “aesthetic”. She constantly comments on how she would decorate differently or suggests that “we” should move furniture around. I usually brushed it off as jokes.

It didn’t really start to get weird until I started coming to her in my apartment after letting herself in while I wasn’t home. A few times I had noticed she rearranged little things, it bugged me but I didn’t outwardly confront her because it wasn’t worth a fight with her.

About two weeks ago, Amelia and I were at a mutual friend’s party and I overheard her talking to someone about “her new apartment”, and when I walked up her friend said something like “it looks nice from the pictures”. Which made me think she was showing people my place and telling them it’s hers.

Group of friends sitting on the floor beside a bed, playing cards and sharing snacks during a hangout.

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A few days later I came home early from work and she was on my couch with a girl i’ve never met. Amelia looked obviously shocked and left quickly to “go shopping”. It happened AGAIN a few days later with our two cousins instead, but she didn’t seem to care that I came home this time. I texted her later and asked her to ask me before inviting anyone over to MY apartment, and all she said was “K”..

After that I assumed all was well, she was still over a lot, but she was acting… oddly nice. I found this weird and was immediately suspicious, but from what I could tell she wasn’t doing anything strange. Boy was I wrong.

Last night I came home after a 12 hour shift and she was there again. But this time, with FIVE friends playing a drinking game in my living room. I was exhausted and LIVID.

I told them all to leave. Amelia tried to talk to me in the kitchen but I wasn’t having it, I told them again to leave and one of her friends asked why I was there. In MY apartment. I lost it. I yelled “because I live here. Amelia lives with our parents now get the f out”

They left quickly but my family is now saying that I embarrassed her in front of her friends, and Amelia is “humiliated”. I honestly don’t think I did anything wrong, but my family is saying my sister is devastated. I’m not even sure what to do from here. I tend to overreact sometimes, but this was wild. And very out of character for my sister.

AITAH?

Edit: update coming hopefully tonight! Yesterday I went over to my parents and confronted them and my sister. I work long hours so I haven’t had much time to post the last few days.

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