My twin sister keeps on telling my parents everything I do. (16F)

Me and my twin sister (both 16F) have always been in the same social circles/friend groups since we were young and have an okay relationship but ever since I was in 5th grade she would tell my parents EVERY SINGLE "bad" THING I DID -- and my parents don't ask us to do this at all. For example, when I was in 9th grade and we were hanging out with some friends during the weekend and I said "what the h##l" and not even 5 minutes later I got a text from my mom saying "Do not say curse at school this is unacceptable." Another time this happened was when I was in class in 10th grade and we were talking about our dad (kids of immigrants talking about our experience about doing homework with our dad) and when I got home that day my dad immediately said "Why did you talk bad about our family at school". This also happens when I'm even texting her about random stuff if I replied to a reel or something with "f##k" I would get a message from my mom 2 minutes later saying "do not swear at your sister". Idk if this is normal or not but it's just been getting on my nerves, she swears sometimes and I don't even care but suddenly when I do it she has to become Paul Revere for my parents. Maybe I'm just being dramatic but please let my know if this is normal!

tldr: My twin sister (16F) has constantly been telling my parents every time I (16F) curse (whenever on calls, messages, at hangouts with friends) or talk about random family stuff.

UPDATE: So I decided to text her about it and I sent super long paragraphs and basically just told her that if she felt hurt she could have told me directly instead of asking my mom (we got into a mini argument yesterday about smthn stupid and her telling my mom made me make this post because it has been happening for so long and I just got fed up) and she just said at the end of our conversation “yeah I’ll stop telling mom ig”. I guess the whole things is over now but I am not sure she means it.