Fanfiction: Bella is Jasper's younger sister - What could be the plotlines in such a story?

One possible plotline could be that Bella becomes Jasper's mom in a world where the normal family relationships are re - arranged. Maybe there are a lot of heart - to - heart moments between them as she tries to understand Jasper's unique abilities and past traumas. For example, she could help him come to terms with his vampire nature in a different way than in the original story.

The other characters might be intimidated by Jasper and thus treat Bella with a certain level of caution. For example, if they are part of a group, the group members might be more careful around Bella because they don't want to anger Jasper. Or, if there are enemies, they might try to use Bella to get to Jasper. On the other hand, some characters might see Bella as a way to get closer to Jasper and be overly friendly to her for that reason.

One possible plotline could be that they run away to escape the complex vampire politics in their world. Maybe they find a secluded place, like a remote island, and try to build a life there. They might face challenges such as hiding their presence from other vampires and dealing with their own internal struggles about leaving their families and friends behind.

Another plot could involve some sort of danger that forces them together. For example, a new threat to the vampire clans that requires their combined skills. Jasper's combat and leadership abilities along with Bella's unique connection to the different supernatural elements could be the key to fighting this threat. As they face this danger side by side, their feelings for each other intensify and lead to a mating bond.

One interesting plotline is the idea of Bella having to choose between Jasper and Carlisle based on more than just love. It could be about choosing a future for herself in the vampire world. For instance, Carlisle might offer a more stable and 'ethical' vampire life, while Jasper could represent a more passionate and unpredictable option.

One interesting plotline could be Jasper helping Bella to control her new - found vampire abilities in a unique way. Maybe he uses his own experience with self - control to guide her.

One interesting plotline could be Bella struggling with her feelings for Jasper while still being in love with Edward. Maybe she discovers a new side of Jasper that she's never seen before, like his artistic talents or his deep understanding of ancient vampire cultures.

One plotline could be that they are both trying to uncover a family secret. Maybe there's something about their parents or ancestors that has been hidden, and they have to work together to find out the truth. Along the way, they face various obstacles and make new friends who help them in their journey.

A possible plot could be that Bella's twin sister has a special power. Jasper is initially skeptical but soon realizes that this power could be useful for the Cullen family. They start to train together, with Jasper teaching her how to control her emotions while she tries to master her power. During this time, they start to have feelings for each other. However, the Cullen family is divided on whether they should fully accept the twin sister into their group. Jasper has to fight for their relationship and for her acceptance within the family.

A possible plotline could be that Bella's new status as Emmett's sister makes her more confident in the vampire world. Since Emmett is a strong and outgoing vampire, he might teach Bella how to better use her vampire abilities if she were to become one in the story. This could lead to her getting involved in more dangerous situations but also growing as a character.