Well, it really depends on how the fanfiction is written. Some might show Ron being completely outraged and cutting off his friendship with them. But in other versions, Ron could be more understanding. He might see that Hermione and Harry have a special connection that he wasn't fully aware of. He could initially be confused and a bit resentful, but as he witnesses their love growing, he might start to support them, seeing that their relationship doesn't mean he loses his place in their lives.
In this fanfiction scenario, their relationship dynamics would change significantly. Since they are siblings, they would probably grow up together. This means they would share more childhood memories, both good and bad. Hermione might be more protective of Harry and Ron as her brothers, and she could use her intelligence not just as a friend but as a sister to keep them out of trouble. Ron would also be more possessive in a brotherly way. They would also face family - related issues together, like dealing with their parents' expectations or family secrets.
Well, it makes their relationship even more complex. Ron might feel a bit left out at first because Harry and Hermione have this new, deeper connection. But then he realizes that it doesn't change their friendship. Harry and Hermione, on the other hand, might be more protective of each other than before.
The relationship between all three could become more complex. Hermione's bad treatment of Harry might make Ron more protective of Harry, causing a rift between Hermione and Ron as well. In the original series, they are a tight - knit trio, but in this fanfiction, the balance is thrown off. For example, they might not be as effective in fighting against the dark forces or solving mysteries together because of the tension.
The relationship changes drastically. Hermione may start to view Ron as someone she once knew well but has now grown apart from. Ron, on the other hand, may go through a range of emotions from denial to anger to sadness. Their friendship that was the foundation of their relationship may also be damaged, and they may have to re - evaluate how they interact with each other in the wizarding community.
After the kiss, their relationship might become more openly affectionate. They could start holding hands more often, stealing glances at each other, and being more protective of one another.
The relationship between Hermione and Ron in this fanfiction takes a sharp turn. It goes from a relationship (presumably) full of the usual bickering and affection they have in the original series to a complete break - up. Hermione's feelings shift towards Bill, leaving Ron behind.
At first, Harry and Ron might be a bit freaked out. But Harry, being more open - minded, would quickly try to understand. Ron, on the other hand, might take some time to get used to it. Eventually, they would realize that Hermione is still Hermione, and they would support her in finding a way to change back if she wanted to. Their friendship would be tested, but ultimately become stronger as they face this strange situation together.
However, this could also lead to a strengthening of their relationship between Ron and Hermione. They would have to rely more on each other without Harry around. And when the truth behind Harry's ignoring them is finally revealed, it could either make their friendship with Harry stronger than ever as they work through the issues, or it could be so damaged that it's hard to repair.
Their relationship with Ron would definitely be different. Harry and Hermione being twins means they would have a lot of inside jokes and shared memories that Ron doesn't have. Ron might get jealous initially because they seem to be excluding him. However, as time goes on, Ron would realize that their bond as twins doesn't mean he is less important to them. He could then start to bond with them in new ways, like helping them with their twin - related magic or investigations.
The relationship could deepen in a way that they rely on each other more. Hermione would need Ron's physical and emotional support during her pregnancy. Ron, on the other hand, would depend on Hermione's intelligence to make sure everything is going well. They might also have a stronger bond because they are creating a new life together. There could be moments of pure joy when they feel the baby move or when they start preparing the nursery, which would strengthen their love for each other.