Sister or Not (A better ending than bch 1993's story version)

This story inside contains a sequel within the story based on the original bch1993's story 'Sister' if you aren't sure what that story is about read this story and you'll understand, this is a better version of bch1993's story where Harry and Ginny thought to be sibs but Lily was a secret surrogate for Molly carrying Ginny, read to find out more, it's very interesting and better.