One possible reason could be Edward's overprotectiveness. He might restrict Bella's actions too much in the fanfiction, which could lead to her feeling suffocated and result in a fight. For example, if he doesn't let her go out with her friends or participate in certain normal human activities.
Another reason could be a misunderstanding. There could be some false rumors or misinterpreted actions. For instance, if Bella is seen with another male vampire by Edward's family and they misreport it to Edward, he could get angry and start a fight with Bella without knowing the truth.
One reason could be Edward's overprotectiveness. He might try to control Bella's actions too much in the fanfiction, which could lead to her feeling suffocated and result in a fight. For example, if he stops her from seeing her human friends often.
Another reason might be Edward's overprotectiveness. He could have made a decision for Bella without consulting her first, like preventing her from seeing a friend. This kind of controlling behavior could make Bella feel frustrated and end up in tears.
One reason could be a shift in the story's setting. If the fanfiction is set in a different time or place, Bella's values and interests might change, leading her to not like Edward. For instance, if it's a modern - day setting with different social norms, she may find Edward's old - fashioned ways off - putting.
Perhaps she has her own vision of their relationship and doesn't want it to be influenced by the often - strange and varying ideas in fanfiction. Fanfiction can be full of outlandish concepts that she doesn't want to be part of. She wants to preserve the unique and special nature of her relationship with Edward as it is in real life.
It could also be due to misunderstandings. Fanfiction often plays with the idea of miscommunication between them. Maybe Bella misinterprets Edward's over - protectiveness as a lack of trust in her ability to handle vampire - related situations. Or Edward might misunderstand Bella's need for independence as a sign that she doesn't love him as much as he thought. These misunderstandings can escalate into arguments.
It really depends on the writer's intention. Sometimes Bella wins if the story is about her growth and empowerment. For instance, if the fight is about her independence, she might stand her ground and make Edward see her point of view.
One possible reason could be their rivalry over a love interest, like Bella. Jacob loves Bella and Edward is in a relationship with her. This love triangle often leads to tension and could easily erupt into a fight.
One reason could be a misunderstanding about their family's future. Maybe Edward has a vision of how the family should evolve that Carlisle disagrees with. For example, Edward might want to expand the family in a different way than Carlisle.
One possible reason could be that Paul represents a different kind of life for Bella. Maybe he is more down - to - earth compared to the often brooding Edward. Paul might offer a simpler and more straightforward relationship without all the supernatural drama that comes with Edward.
One possible reason could be that Bella discovers a different side of Jasper that she finds more appealing. Maybe Jasper shows a deeper understanding of her in some aspects that Edward lacks. For example, Jasper's past experiences might make him more empathetic towards Bella's own struggles in a way that Edward, with his own set of vampire characteristics, doesn't quite get.