In a possible plotline, they could be trying to protect each other from a threat within the vampire world. As they grow closer in this protective bond, they start to have some confusing feelings for each other. The 'lemon' aspect might involve some passionate scenes where they almost cross the line of their new sibling relationship. They might also be dealing with the reactions of their friends and other vampires who sense something strange in their relationship. This could lead to a lot of internal conflict for both Bella and Emmett as they try to figure out what is right and wrong in this new situation.
Well, perhaps they discover they are siblings after some long - lost family mystery is unraveled. As they adjust to this new reality, they might face jealousy from other members of their coven. And for the 'lemon' part, it could be that there are some intense emotional moments between them that border on inappropriate feelings, which they have to overcome as they realize the importance of their family connection. Maybe they are in a situation where they are forced to rely on each other in a very close way, and those feelings start to develop, but they know it's wrong because they are siblings.
There could be. Fanfiction writers are known for their creativity and for pushing the boundaries of the original source material. While the idea of Bella and Emmett as siblings is not in line with the traditional Twilight narrative, in the realm of fanfiction, anything can happen. But given the rather unusual nature of this concept combined with the 'lemon' aspect, it may be a bit more niche and harder to find.
In some fanfictions, they might be reimagined as siblings. However, in the original 'Twilight' series, they are not siblings. Fanfiction often takes creative liberties to explore different relationships between characters.
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.
One possible plotline could be them dealing with the discovery of their newfound sibling relationship. They might struggle with how it changes their previous dynamic, whether it was friendship or something more ambiguous. Another could be them protecting each other from the various threats in the 'Twilight' world as siblings, like facing off against other vampires or werewolves.
One interesting storyline could be them protecting each other from supernatural threats in their world. Since they are siblings, they would have a strong bond and would go to great lengths to keep each other safe.
A plotline might involve Bella having to choose between different aspects of her relationships with Jasper and Emmett. For example, Jasper could offer her a more cerebral and controlled relationship, while Emmett might represent a more passionate and physical connection. Also, they could all be on a journey to discover more about the origin of their unusual mating bond.
A plotline could involve Bella's family's reaction to her relationship with Emmett. Given her blindness, they might be even more worried about her getting involved with someone like Emmett. Also, the fanfiction could show how Bella and Emmett communicate on a deeper level. Since she can't see, they might develop a stronger telepathic or emotional connection that is unique to their relationship.
Their relationship can be shown as a very protective one. Emmett, being the stronger one, might always be ready to shield Bella from any harm. For instance, if there are other characters who pose a threat, Emmett would step in front of Bella without hesitation.
One possible plotline could be that Emmett, as Bella's landlord, is very protective of her. Maybe he notices some strange things going on in the neighborhood related to the vampire - human world in Twilight, and he tries to keep Bella safe without revealing his own true nature (if he's a vampire in the fanfic).
One common plotline could be them facing challenges from other vampires who don't approve of their relationship. Since Emmett is strong and Bella has her own allure, others might see their union as a threat to the vampire hierarchy or social order.