Momentary Illusions

AU post DH. On the 22nd of August 1976, Molly Weasley gave birth to her first daughter, Priscilla. But Priscilla became Percy. To make him more comfortable, they never mentioned it to the twins, Ron or Ginny that Percy was born a female because it doesn't matter. And it shouldn't. But then Percy is diagnosed with ovarian cancer after they lose Fred... Established A/P, 2nd gen.