My sister (16) is very interested in musical theatre/acting. She enjoys singing very loudly around the house. I (18f) on the other hand am fairly quiet and like my peace.  
I try to a supportive sister, but sometimes it just gets a bit much. Especially when im down for dinner and trying to eat. I end up not going down to eat and hang out with my family as much. Now, when I ask her (Nicely) to be quiet, i'm usually met with my mother/father telling me it's her passion and i should just pretty much deal with it. And my sister ends up being pretty rude to me.  
Now a point she brings up which I think is actually quite valid is that for a while, I was talking quite late with my friends online. The only thing is I havent done this in a while, so while I do feel bad it's not like it's an ongoing issue, as well as my problem was mostly accidental, and I made sure to shut up when asked. But I can't help like feeling like a hypocrite whenever this is mentioned.  Am I an asshole in this situation?

