Help!

I ordered a Marilyn Manson cd but my parents don't know about my liking of the dark music and stuff and I'm not home and my mom just texted me asking what's in a package that she found in the mail with my name on it! If I tell her what it is she won't approve at all because she loves pop music and she'll think I need help! What do I tell her is in the package? I don't think she'll make me open it in front of her, but if I tell her its something like a toy for my cat she'll open it without me! HELP!