harry potter sister

Hi my name is lilyann june potter i know what your thinking why is my name just like my mother and that i am not a potter because no one knew about me.
Here is the thing james isn't my father but can you guess who i can give you this he was there for my mother when my aunt called her a freak and he was her best freind who was secretly in love with her.

Right now i am with my cousin dudly who wont shut up because i am and orphan and that my mom had some affair and that i am a huge problem because james always hit me.
so they just locked me away in the attic but i find ways of getting out but that is my life so yea.
I just have one problem.

WHO IS MY FATHER?

hi citizens its emily here can you guess the father ill give you this he acts like he hates harry in the first couple of movies but he is really protecting him