Since we have so little information about the 'Billie World War 2 Lost Story', Billie could be anyone. He or she could be an Allied or Axis soldier, a resistance fighter, a refugee, or someone working in the war - related industries. It could be that Billie's story was lost because it was overshadowed by more well - known events or because it was simply not recorded properly at the time. The name Billie gives us no clear indication of who this person might be in the context of the story without further details.
There could be Billie's family members, like her parents or brother. They would play important roles in the new family dynamic that the adopted character is entering. Also, her management team might be characters in the fanfic. They could be shown as having an influence on the family life, perhaps in terms of scheduling or how the adopted character is presented to the public.
Well, it's hard to say for sure. The concept of 'porn-like' is quite subjective. Some might consider certain novels with excessive sexual descriptions as such, but it depends on individual perspectives and cultural standards.
In many places, 18+ porn comics are considered illegal. This is because they can have a negative impact on society and violate moral and legal standards.