One idea could be that Bella is scraped while trying to protect Carlisle from a rogue vampire. Carlisle is then filled with gratitude and takes extra care of her. This event could spark a new friendship that makes the other Cullens a bit jealous or confused.
In such a fanfiction, perhaps Bella could be in a minor accident (getting scraped) and Carlisle, being a doctor, might tend to her wounds. This could lead to an intimate moment of care and concern between them, deepening their connection that might be different from the typical Bella - Edward relationship in the original 'Twilight' series.
One example could be when Bella tries to learn more about vampire powers on her own without Carlisle's permission. Carlisle, being very cautious about keeping their existence a secret, would not be happy with this as it could lead to unwanted exposure.
One idea could be exploring how they handle the reactions of the Cullen family. Some might be happy for them, while others could be a bit skeptical at first. Another plot could involve Bella learning more about Carlisle's long past and how it shapes their relationship. They could also face challenges from the vampire world due to their unique union.
One idea could be Carlisle having to protect Bella from a new vampire threat that is specifically targeting her for her unique connection to the Cullens. Maybe a group of nomadic vampires who are jealous of the Cullens' lifestyle.
In this type of fanfiction, a great plot could be that Carlisle and Esme discover Bella has a prophetic dream ability. This ability makes her very valuable in the vampire world as she can foresee potential threats. However, it also makes her a target. Carlisle and Esme must then train Bella to control her power while also keeping her safe. Additionally, the family dynamics could change as Bella becomes closer to them. She might start to change some of their long - held beliefs about humans and vampires, and this could lead to internal family discussions and growth.
A plot could revolve around Carlisle and Bella going on a secret mission together. Maybe they have to find a lost ancient vampire artifact that could change the future of the vampire world. Along the way, they develop a deep bond and respect for each other.
A possible plot could be that there is a threat to the vampire community that only Bella and Carlisle, with their combined skills and knowledge, can solve. As they work together, they start to see each other in a different light. Carlisle might see Bella not just as a young vampire but as a strong and intelligent equal, and Bella could gain a deeper respect for Carlisle's wisdom and experience. During this time, their relationship could evolve in unexpected ways, like a deeper friendship that is on the verge of something more, but they are hesitant due to the age gap and their different roles in the vampire family.
Well, a plot could revolve around Carlisle and Bella having to work together on a school project at Forks High School. During this time, they start to understand each other on a deeper level. Maybe Bella discovers some long - lost medical knowledge that Carlisle had forgotten from his past, and this helps him in his work at the hospital. It could also be a story where Bella has a premonition about Carlisle getting into trouble and she has to convince him to believe her.
Sure. There's a fanfiction where Carlisle and Bella are in an alternate universe. Carlisle's possessiveness in this one is not just about love but also about a prophecy that ties their fates together. It's really unique as it combines elements of mystery and the classic possessive relationship between them.
One plot idea could be the internal struggle they face within the vampire community. Since vampires usually have a monogamous mate concept, the three of them being mates would be a huge deviation. They might have to deal with the judgment and envy of other vampires. Another idea is exploring how they protect each other from outside threats. For example, a new vampire coven that doesn't accept their unusual relationship might try to harm them. And also, their daily life together could be full of interesting moments like sharing their different experiences from their long vampire lives.