Not Everyone is as they seem

What if Bellatrix had a daughter the same age as the golden trio? Lucinda Lestrange gets rescued from the basement of Malfoy Manor and taken to Grimmauld place to meet the order of the Pheonix. But what if she knew one of them a long time ago? How will this change the course of the war? My version of the cursed child because I hated it. I'm no good at explaining things read it.