Forgotten Parker Sister (Rising Anna Parker-Wayne)

BOOK ONE!
Peter Parker has a sister, Anna Parker, who got adopted with him by Tony Stark. Only things change for her when she is left behind in Gotham at a gala event and found by Bruce Wayne and Clark Kent, and together they adopt her into their family.
Anna then finds herself surrounded by more superheroes and vigilantes who treat her with the love and care she never got from the Avengers.
But when another event comes up, Anna finds herself facing her brother and her former adoptive family once again.