Am I a bad person?

Dear anonymous,

Ashley, my sister, and I have been having a bunch of yelling sessions the last two days. Basically it revolves around her saying that I'm a bad person. Things like me constantly calling her stupid, putting her down, telling her that she can't do things like have her friends over are coming up a lot. I guess it's just making me wonder if I really am a bad person. I don't know. Maybe I'm just a horrible sister.

Love,
Michelle