I honestly don't understand bullying your sister for listening to metal, unless they're like super hardcore black metal fans or something, but even then it's a bad look on them for being elitist. But I'm guessing they're not into BM and are either anti-music scum or listen to something pansy-ass.
https://youtu.be/2vXL7P7Gfb0
(DP isn't pansy-ass, in case that wasn't clear because of me dropping the video in after writing that comment)