I (18M) didn't want my sister (14F) to tag along on senior night so I paid for it myself and now my parents are disappointed in me

Ok so I am 18 and I have a 14yo sister,I am a senior in HS and she is a freshman. My school's senior night is at disney land cause you know were spoiled californians. I don't really have the money to pay for a full 500 dollar bus trip, so me and a couple of my friends decided on just driving and meeting everyone there, still need money for a senior pass and a ticket plus gas money I asked my parents for some money (about 200 for the ticket plus senior night pass cause we are staying after the place closes). We go to a charter school so we don't got school on monday and the senior night happens to be on a monday. My parents gave me the money early and I was grateful cause this is like the last thing ill ever do with most of these people not in my main friend group. Last week my parents said that if I want to go I have to bring along my little sister........I absolutely rejected this idea cause 1.I don't want to babysit a 14yo around disneyland 2.I don't want to censor myself or friends cause I don't want a 14 year old to hear what 4 teenage boys say to each other. 3.I am bringing my vape (My parents know I have it and its legal for me to have one) and I don't want her to get her hands on any of ours. and lastly this is SENIOR night, she can do this when she's a SENIOR, if she goes, then she doesn't have a pass and me and my friend group will need to leave early.

I protested this but they said if you want our money then take her, I already cashed it in and now I'm screwed. My sister seems excited to go to disneyland cause she hasn't been since we were like young kids and our foreign cousins came to visit us. But she can go in like 3 years when she is a senior. I am currently working on getting the money back to give my parents cause the last thing I want is for a 14 year old to ruin MY senior night that I've waited since 8th grade to go to. My sister is pretty bummed cause now she doesn't get to go to disneyland, but if it really meant so much to go I wouldn't mind doing it as a family thing another time. My parents are pretty pissed I'm doing this saying I need to be a "big brother" which I don't mind but fuck she's not a senior and if she does go then it means I don't really get a senior night.

So these are my choices either make my parents and sister (I think) happy and take her to senior night and take their money, or make both of them (I think just my parents) disappointed and pay for it myself. What would be the best course to go about this?

TL;DR: My parents gave me money for senior night but then said I need to bring my sister along but I decided to just pay the back so that doesn't happen

Submitted November 15, 2019 at 08:15PM by Sister_disneyland https://ift.tt/32Uth3A