Raised Differently (twins)

Petunia married with Charles and Dorea Potter's son instead and found out she was a witch where she attended Beauxbatons Academy instead. When her sister and James' were killed, she vowed to protect and raised her nephew and niece along with her daughter. Godfather Severus! Godfather and free Sirius! Alive Regulus! Good Malfoy's (later into the story).