In this fanfiction scenario, their relationship might develop gradually. Jasper, having a newfound sense of fatherly duty, would start to teach Bella about the secrets of their world. They could bond over shared experiences, like facing off against other supernatural beings. Bella might initially resist Jasper's fatherly influence, but as she sees his genuine care for her, she starts to accept him more and more into her life.
Their relationship might start with a sense of mystery. Bella is intrigued by Dark Jasper's dark allure. As they interact more, they could gradually develop an understanding of each other's pain. For example, Jasper's past traumas and Bella's own insecurities. This mutual understanding can deepen their bond.
In many of these fanfictions, their relationship develops through shared experiences. For example, they might face a common enemy together. Jasper will use his vampire abilities to protect Bella, and in the process, their bond deepens. Their relationship also has to navigate the social and family dynamics within the vampire community. Some stories show Jasper having to convince his vampire family that his love for Bella is real and not a passing fancy. And Bella, on her part, has to come to terms with her feelings for a vampire who has a complex past.
The development of their relationship in fanfics can be quite complex. Some fanfics might show Jasper using his gift to calm Bella's nerves, which then becomes a way for them to get closer. As they interact more, Bella may start to see Jasper in a new light, not just as a member of the Cullen family but as a potential love interest. Their relationship might also be affected by the events in the Twilight world, such as battles with other vampires. These events can either bring them closer together as they rely on each other for support or create new tensions. But overall, in these fanfics, the relationship between Bella and Jasper often evolves from a simple attraction to a multi - faceted and passionate connection.
In the fanfiction, their relationship might develop quite uniquely. Since Jasper has a complex past, he may be hesitant to fully embrace Bella as a sister at first. But as they face challenges together, like dealing with other vampires who are against their relationship or trying to keep Bella's human friends safe from the vampire world, they grow closer. Jasper might start to see Bella as a symbol of hope for his own redemption. And Bella, on the other hand, might see Jasper as a source of strength and knowledge. They could end up having a really deep and meaningful bond that is based on mutual respect, protection, and love for each other as family.
A unique way for their relationship to develop is through a shared interest in art or music that neither of them expected. Maybe Bella discovers that Jasper has a hidden talent for painting or playing an instrument, and this new side of him draws her in even more. They start to create art together or attend music events, and through these shared experiences, their love as soulmates blossoms in a way that is distinct from the typical vampire - human relationships in the story.
One possible plot twist could be that Jasper discovers some hidden power or heritage in Bella that he wasn't aware of before. This could change how he views her and their relationship. Another twist might be that there's some sort of enemy from Jasper's past who targets Bella because of her relation to him. It could also be that Bella finds out some dark secret about Jasper that makes her question whether she can really trust him as a father.
Jasper's character development could be a downward spiral. His cheating on Alice could make him lose the respect of those around him. He might become more secretive and manipulative to cover up his actions. Bella, initially attracted to Jasper, could start to see the negative side of him as the situation unfolds. She might grow to regret getting involved. Alice, being hurt, could turn her pain into strength and become more independent, focusing on herself rather than relying on Jasper. She might also develop a new sense of self - worth and not tolerate any more disrespect in her relationships.
In the beginning, the relationship could be full of misunderstandings. Harry might expect Jasper to be a perfect father right away, while Jasper may be hesitant because he's not used to having a son. However, as they spend more time together, they could start to open up. For example, Jasper could teach Harry about his family history or special skills. Harry could in turn show Jasper a new perspective on life, and through shared experiences like facing a common enemy or helping others, their relationship would strengthen and become more like a real father - son relationship.
Since I haven't read the fanfiction, I can't say for sure. But it's possible that there could be new characters introduced to either support or oppose this strange relationship between Bella as Jasper's pet. Or perhaps some existing characters from the original story might have different roles or personalities to adapt to this new situation.
It often starts with attraction. Edward is drawn to Bella's unique scent and her differentness. Bella, on the other hand, is intrigued by Edward's mysterious nature.