I don't have specific knowledge of popular 'waige baby fanfiction' stories. However, typically, a story might become popular if it has really engaging writing, unique takes on the Waige relationship with a baby, and if it resonates with a large number of fans. It could be that some stories gain popularity through word - of - mouth within the fan community, but without delving deep into that particular fanfiction realm, I can't point out any definite popular ones.