It could be that Bella gets in trouble with Carlisle because she disobeyed one of his rules. For instance, if she went out alone at night in a dangerous area where there are other vampires who might not be as friendly as the Cullens. Carlisle, being the patriarch of the family, would be concerned about her safety and the safety of the family as a whole. So, he might restrict her activities or give her a stern talking - to.
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.
Perhaps Bella walking in on them could trigger a series of events. Carlisle and Esme might be discussing something important about the family or a vampire - related matter. Bella's unexpected presence could change the course of that conversation. They might then include Bella in the discussion, or they could try to quickly change the topic to something more general to avoid making Bella uncomfortable.
She might lose her friends. In fanfiction, when a character like Angelica gets in trouble, it often leads to a strain in relationships. Her friends could start to avoid her, thinking she's a bad influence or too much trouble to be around.
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.
She might face consequences from the other characters. For example, if she's in a school - based fanfiction, she could get detention. The authority figures in the story, like teachers or elders, would likely discipline her for her bad - ass behavior that led to trouble.
In some fanfictions, there could be a grand display of the Cullen family's unity. They might have a party filled with elegant decorations, like twinkling lights and beautiful floral arrangements. There could be a special dance between Carlisle and Bella, and the other Cullens would be happily celebrating around them.
Well, it could be that they start sharing their unique experiences. Harry might talk about his wizarding world adventures, and Carlisle could share about his vampire existence. They might then find some similarities between their two very different worlds and decide to learn from each other.
Perhaps the accident was no accident at all. It could be part of some villain's plan to get to Bella. So, in the fanfiction, there could be a mystery element where Bella has to figure out who is behind the so - called accident while she recovers.
They might face a powerful dark wizard. In fanfiction, there are often new villains created. This new dark wizard could be after something they have, like an ancient magical artifact that Harry and Ginny are protecting.
In some cases, when Dexter gets caught, the people who catch him might try to rehabilitate him. They could think that there's still some good in him and attempt to change his ways. However, Dexter might resist this change as his nature is deeply ingrained. This could lead to a power struggle between him and those who want to reform him, creating a lot of drama and tension in the fanfiction story.