It could be a story of conflict and power dynamics. Maybe Narcissa is in a position of dominance initially, but as the story progresses, Hermione uses her intelligence to turn the tables. For example, they could be in a magical duel - like situation where physical positions play a role in the magical exchange.
One possibility is that it's part of a rescue or capture scenario. Narcissa might be trying to restrain Hermione for some reason, perhaps related to the overarching plot of the wizarding world. However, Hermione could then use her wits to either escape or gain an advantage over Narcissa. This could lead to a complex relationship development between the two characters as they learn more about each other's motives and capabilities.
Perhaps it's a story about a prank gone wrong. Pansy was planning to play a trick on Hermione but ended up in this rather compromising position. It could then lead to a series of events where they have to deal with the embarrassment and the reactions of their friends, and in the process, they start to understand each other better.
It might symbolize protection. If Hermione was in danger, Fleur could be using her body position to shield Hermione from harm. This would show Fleur's loyalty and courage in protecting her friend.
The secrecy would be a huge issue. They would have to hide their relationship, especially considering Narcissa's past associations. If Voldemort were still alive in the fanfic world, any sign of Narcissa's relationship with Hermione could put both of them in danger. Also, their different values in some aspects, like Hermione's strong belief in equality and Narcissa's upbringing in a more elitist pure - blood culture, could cause conflicts.
One possible plot could be that Bellatrix is trying to intimidate Hermione. In many fanfictions, Bellatrix is a menacing character. She might straddle Hermione's waist to assert her power and dominance, perhaps during an interrogation where she wants to break Hermione's spirit and get information from her.
I'm sorry, but I haven't come across specific fanfictions with this exact scenario. You could try searching on popular fanfiction websites like Archive of Our Own or Fanfiction.net using those keywords to find relevant stories.
Well, the relationship might be complex. Narcissa could see Hermione as a unique asset, like an intelligent pet that she can show off or use to her advantage in some way. And Hermione might be in a position where she has to play along to survive or gain something. For example, Narcissa could be using Hermione's knowledge to further the interests of the pure - blood families, while Hermione is trying to figure out how to turn the situation to her own benefit.
There could be many potential authors. It might be a relatively unknown writer in the fanfiction community who just wanted to explore this unique interaction between Ginny and Hermione.
Well, in some fanfictions, it can start as a power play. Bellatrix, being the dark and powerful character she is, uses the physical position as a way to assert dominance over Hermione. But then it can lead to a more complex relationship where Hermione, instead of being completely submissive, challenges Bellatrix, and this can be the start of a strange sort of mutual understanding or even a twisted form of attraction.
In this fanfiction, it could be that Narcissa has fallen under the influence of a dark magic artifact. This artifact has warped her sense of self and made her act in this abnormal way towards Hermione. The plot could then revolve around Hermione trying to find a way to break the hold of this dark influence on Narcissa, while also dealing with the emotional and physical trauma of such an invasive act. It might also involve other characters from the Harry Potter universe either trying to help or being unaware of what is going on, which would add more layers of complexity to the story.
There could potentially be a fanfiction with that description. However, it's not a very common or mainstream concept. Fanfiction often explores unique and sometimes controversial relationships and situations. But this might be considered a bit out there, and it may be difficult to find unless you search through some less - regulated or more extreme fanfiction communities, which I don't really recommend as they may contain inappropriate content.