So I (19 f) got my own place last year, because i started uni and had to move away from home. (But currently i am with my parents because there is a Semester break)

My parents live in a pretty small city. There are very few Shops and bigger Brands are nowhere to be found. But i now live in a pretty big city with a lot of Shopping malls and basicly any Store you‘d need, you‘d find somewhere.

My sister (16 f) and I were talking about having a sleepover at my place, so that we can have a nice „Girls day“ and Go Shopping for some things she could Not get at home. I agreed, because i thought we could have a nice time.

Later that day my sister told me that one of her Friends (Note: my sister has a friendgroup with three of her close Friends, whom i know well, because we grew up together) has been asking for a while now, if she could come over to my place some time, because she really wanted to see it. I told her that i would be Fine with her friend joining, because i know her well and she is a very sweet person, that does Not usually cause drama.

My sister then said that another friend also mentioned that she wanted to See my place. I then told my sister, that i would be Fine with this friend as well because she too does Not cause much drama, but i was Not sure, if we‘d have enough space to sleep.( my appartment only has one room +bathroom ofc and there is really really Not much space) We then planned a bit around and found an accaptable way that should work for everyone.

My sister then wanted to text her friends and ask them if they would have time for the sleepover. But she wanted to do so in a group Chat with the whole friend group, because she does Not think the third girl was gonna say yes anyway. I told her that would be stupid, because she would risk her saying yes and we physicly could not take all of them with us. Also i told her that i would not want to take that third friend with us, because i would be the one that has to look out for them, because i am the only adult and this friend is someone that loves taking riscs and getting in trouble (smok1ng, dr*gs, alcoh0l + pushing the Rest of the group to join her) So i would not be comfortable being in charge with her there.

My sister said it would be unfair of her to invite only 2 out of 3 friends. I told her that i understand but we physicly could not take everyone with us. And that she could maybe just choose one to invite.

My sister texted them all anyway. Guess what everyone wanted to come with us……

My sister now started asking me what she was supposed to do now and i just Said, that i was really mad that she did not listen to me and went behind my back. So i offered, to maybe only Tell them that things changed and she could only Take one or something, but she Said that would be stupid.

So she told the group that only two could come and suggested that the first two friends should be the ones to do so, because they have been asking to come over for a while now.

The third friend answered that if one of them could not come with, then maybe all of them should stay home.

My sister then accused me of trying to split up their friendgroup, which makes no sense, because she was the one that asked me if her friends could join to begin with. She then called some relatives and told them that I made her loose all of her friends (they are all still friends, no idea why she said that stuff) and I got some mad phonecalls.

So I just told my sister that we are not gonna have a sleepover at all, because I was not gonna waste my energy on this stuff. Funny enough she then freaked out that she now could not get the item she wanted from the mall, while not even caring about us now not being able to spend time together. (That would have been the last time we could see each other for the next few months)

So everyone is telling me that I am the A hole in this situation, so what do you guys think?

Also sorry for anything misswritten, English is not my first language.