AITA for kicking my cousin and her boyfriend out after I caught them having sex in my bed?

im a 20 year old college student and this happened last year when I was staying with my older cousin and her husband during the summer to look after her dog. She has an extra room and I’m only staying in the room so I’m pretty much not in the way and she doesn’t mind that I was dating my ex girlfriend at the time but she had one rule which is that, I wasn’t allowed to spend the night with my girlfriend at her place. It wasn’t weird at all because I wasn’t really allowed to stay the night in a girls house in the first place (except for my cousin obv) and I don’t think I would do it if I wasn’t required to anyway. But in return, I wasn’t allowed to have anyone over as well. <br><br>Now I was out grocery shopping and when I came back to the house, there was a very strong smell of sex in the air and I was very annoyed. I check my room and BAM! There my cousin and her boyfriend are having sex in my bed. I completely lost it I felt violated and angry. I told them off and then I kicked them out and went back to my cousin and told her what happened and she was mad at them too. Together we kicked them out. I was the only one who was mad at me for doing what I did and that was my aunt (their mom) she said I was immature and overreacted and ruined their relationship. But in my defense the room I’m staying in, is literally MY room it was my grandmas room way before my cousin got it but since I was staying there she switched rooms with me. So that room was my room. She saw that I was really mad too and said maybe I overreacted and ruined their relationship.