Perhaps Bella has a bucket list in this fanfiction. She could be determined to complete all the things on it before her condition worsens. This would involve her going on adventures, like traveling to places she's always wanted to go, or doing things she was too scared to do before, all while dealing with the challenges that leukemia throws at her.
A plotline might involve Bella's search for alternative treatments. She could start researching different therapies or join support groups where she meets people with similar experiences. This could lead to her finding a new sense of hope and purpose, and she might even try to raise awareness about leukemia in her community.
One possible plotline could be Bella's struggle to lead a normal life while dealing with her heart problems. She might have to limit her physical activities and face the disappointment of not being able to do things she loves. For example, she could have dreams of running a marathon but her heart condition makes it impossible. Another plotline could involve her finding a new hobby that is more suitable for her health, like painting or writing, which helps her express her emotions about her situation.
One possible plotline could be that Bella's golden eyes are a mark of her being a chosen one. Maybe in a world full of different supernatural beings, her golden eyes set her apart and make her the target of both good and bad forces. Another plotline could be that her golden eyes are a result of a spell gone wrong, and she has to find a way to reverse it while dealing with the consequences of looking different.
One possible plotline could be Bella struggling to keep her two personalities a secret from her friends and family. For example, one personality might be outgoing and adventurous while the other is shy and reserved, and she has to constantly switch between them in different social situations without getting caught.
It could be that Bella starts the affair out of a sense of boredom in her current relationship. As the fanfic progresses, she might realize the mistake she's made and have to face the consequences, like losing the trust of her partner and having to deal with her own guilt.
Another plotline might be that Bella is weak in a particular skill or power in a world full of powerful beings. Let's say it's a world of super - heroes and she has no super - powers or is very bad at using them. However, she discovers that her weakness is actually her strength in disguise. For instance, her lack of a certain power makes her more relatable to the normal people in that world, and they start to see her as a symbol of hope. So she uses this new - found status to bring about change and fight against the evil forces in the story.
Well, in this kind of fanfiction, it could be that the cheating leads to a big confrontation between Damon and Bella. Bella might be heartbroken and decide to cut off all ties with Damon immediately. Then there could be a sub - plot where Damon's friends find out about what he did and they either support his bad behavior or try to convince him to make things right with Bella.
One possible plotline could be Bella's friends and the Cullens coming together to rescue her. They might plan a stealthy infiltration of Aro's lair, using their unique abilities. For example, Alice could use her visions to anticipate Aro's moves and find the safest way in.
Perhaps there's a plotline where Bella discovers some hidden powers she has as Hades' daughter. She could then use these powers to either protect the underworld or cause chaos, depending on her motives. For example, she might be able to control the souls in the underworld in a unique way that no one else can. This newfound power could attract the attention of other powerful beings, leading to various adventures and challenges.
Perhaps there's a plotline where Bella has to choose between her duties as the goddess of the hunt and her love for a mortal. This love could put her in a difficult position as it might interfere with her responsibilities. Or, a strange and powerful artifact is discovered in the forest that has the potential to either enhance or destroy the hunt. Bella must figure out what to do with it, whether to keep it safe or destroy it, all while facing opposition from other interested parties.
Perhaps there is an external threat to their mateship. A powerful villain could be trying to break them apart for some reason, like using magic or blackmail. So, they have to fight against this threat to stay together.