I'm Who's Daughter? (A Batman, Joker and Harley fanfic)

Lacey Jade Harrison was adopted by a wonderful couple at the age of three, before that she lived in Gotham's best Orphanage. No one but one person knew who her birth parents were, that person is Batman. The story goes that he took her away from criminally insane parents to make sure she had a happy healthy life,
in so many ways she thanked him for this, her parents must have been bad people before batman would steal their child right? But on the other hand she resented him for it, for denying her the opertunity to know where she came from.

But one day soon she would discover who her parents are and it will open her up to a whole new life, a life of crime, but is crime in her blood or will she prove them wrong?