Well, at first, the Cullens might be more suspicious of Bella since she's related to James. But as they get to know her better, they might see that she's different from her brother.
Since Bella is James' sister, the Cullens could be more guarded around her. However, Bella might try to prove herself to them, which could lead to a slow - building trust. She might have to work harder to be accepted into their family compared to the original story. For example, she could offer to help them with things related to vampire lore that she learned from her family, including James. This would gradually change their relationship from one of suspicion to a more friendly or even family - like bond.
In this fanfiction, the relationship between Bella and the Cullens would be completely different. The Cullens would be very cautious of her at the start. But as time goes on, Bella could show that she has different values than James. Maybe she helps them in a time of need against a common enemy. This act of selflessness could start to change their perception of her, and over time, they could develop a deep respect and even love for her, just in a much more complex and different way than in the original Twilight story.
It would change everything. In the original story, Bella is drawn to the Cullens on her own. But if Victoria is her mother, Bella might be more reluctant to be around them because of her mother's enmity towards them. The Cullens would also be very cautious. Edward, for example, might not be as quick to fall in love with Bella. There could be a lot of suspicion and mistrust on both sides, and Bella would be in the middle, trying to understand her new role in this complex situation.
Her relationship with Jacob would likely change. Since she hates the Cullens, she might turn more towards Jacob for support. They could become closer as she sees Jacob as an alternative to the Cullen world. With her human friends, she might try to distance herself from any connection to the Cullens. So, she could be more secretive or withdrawn from them as well to avoid any talk about the Cullens.
It changes drastically. Usually, the trust is broken. Bella may become very guarded and distant towards Damon.
Well, it might become stronger as they face this new challenge together. They have to rely on each other more for support and decision - making regarding their baby.
Well, it becomes more platonic. There's no romantic tension between them like in the original. Instead, there could be a sense of loyalty and family - based love.
In this fanfiction, the relationship between Bella and Edward is turned on its head. Bella's role is now to shape Edward's character from a young age. Their interactions will be less about the intense passion of the original story and more about the tender, sometimes difficult, bond between a mother and son. She might worry about his future, his choices, and his safety in a way that is very different from the love - based concerns in the original narrative.
She might start by giving them the silent treatment. Just ignoring them completely when they try to talk to her, which would be a very human way of showing anger.
In the mafia setting, their relationship becomes more dangerous. They have to deal with threats not only to their love but also to their lives. For example, if Edward is a mafia boss, he has enemies who might target Bella to get to him.
Her relationship with Bella would likely become more complex. As a vampire, she would have different needs and instincts. She might be more protective of Bella in a way that Bella doesn't understand at first. For example, she could sense danger towards Bella that a human wouldn't notice. But at the same time, Bella might be a bit afraid of her sister's new vampire nature, which could create some tension between them.
It could be that the fanfiction writer took a different approach to the story. In some fanfictions, the Cullens could be involved in situations that go against what Bella stands for. Perhaps they are written to be more secretive and untrustworthy, leading to Bella's hatred.