AM I THE ASSHOLE (update!)

Huge misunderstanding no I am not in the wrong. My dad thought I said something while he wasn’t looking because I didn’t say anything at all and he was trying to justify my sister’s behavior. She said she was irritated that I sounded uninterested in the 5 day trip because I was worried for my bird. She also said she was annoyed which is why she told me to stfu. Had internet cut for a day because I refused to go to therapy (regular thing for depression but I was just way too sad so go outside) after I asked my sister why she was upset with me and she called me dense because I didn’t know. I asked with a genuine interest so I could apologize (I have said sorry for annoying her) but I thing I am still justified in thinking her reaction to me acting normally was totally random and wayyyy too much. Dad now believes I did nothing wrong after I explained everything and how there was no chance for me to do anything wrong without him there as me and my sister didn’t react until dinner.
Not the asshole… I got no apology from my sister for being yelled and sworn at… i also got the same treatment from asking what I did… I’m ok with that though because I just want to know im not hallucinating myself being calm if I’m actually not despite me being in a perfect mood.
Sorry no time to write but I wanted to as it’s been on my mind very clearly… thx for the feedback that was given