Some fans might be interested in exploring the darker side of the Harry Potter universe. They want to see how the extreme evil of Bellatrix could interact with the strong - willed Hermione. It's a way to push the boundaries of the story and see how characters would react in extreme situations.
The story of Molly Bloom is typically not considered real. It might draw inspiration from various sources but is crafted for entertainment or artistic purposes, not to represent actual events.
To be honest, I have no definite answer. It might be completely made up or have some roots in reality. Without more context or information about the story, it's difficult to tell.
Yes, it's possible. Fanfiction writers often come up with very unorthodox ideas to create new stories. In the context of Harry being Bellatrix's son in a fanfic, it would completely change the dynamics of the story. Harry's character development, his relationships with other characters like Dumbledore and Voldemort, would all be radically different. It would be an interesting, if not controversial, exploration of the Harry Potter world.
Yes, there are some out there. One interesting piece might be on certain fanfiction websites where the author explores a very alternate universe scenario. They might rewrite the entire plot around this relationship, delving into how Harry's character would change being married to Bellatrix. It could involve a lot of character development and exploring the power dynamics between them, given Bellatrix's loyalty to Voldemort and Harry being the 'Chosen One'.