Maryona Lily Potter (Harry Potter's younger sister fanfic)

Hiya my name is Maryona Lily Potter. Ya thats right I am the younger sister of the boy who lived. Its not like anyone cares though. Well except for this one professor who is always wearing black. I mean what is up with that?!?!
I am of course talking about Professor Snape. Well anyway this is the tale of me the girl who lives in the cupboard
under the stairs. Thats right they moved Harry and not me. Talk about favoritism. Not. Seriously they hate us both equally. Anyway. I'm finally going off to Hogwarts. Harry already started last year and left me alone with the Dursleys. Ya not a good idea.