A story could revolve around the couple trying to have a normal life despite Elijah's vampire status. They could be trying to buy a house, but face discrimination from the neighbors who sense something different about them. This would explore themes of acceptance and the lengths they would go to for a normal life together.
Perhaps a plot where Elijah's married life is disrupted by his family's past actions. His family's enemies might target his spouse to get back at him. This could lead to a story of him protecting his loved one at all costs and having to make difficult choices between his loyalty to his family and his love for his spouse.
One idea could be that they face challenges from the supernatural community due to their unborn child's potential power. The other vampires or witches might see the baby as a threat or a valuable asset. Another plot could be them preparing for the arrival in a world full of danger, like building a safe haven and gathering allies.
One plot idea could be the challenges they face in keeping the pregnancy a secret from their enemies. Another could be how they prepare for the arrival of the baby in a world filled with supernatural threats. For example, they might have to find a safe place away from the constant power struggles in their supernatural community.
A possible plot could be that Bella and Elijah are from different species in the fanfiction world, for example, one is a vampire and the other a werewolf (assuming such a scenario exists in this fanfic). Their pregnancy is then a very unique situation that defies the norms of their world. This could lead to a lot of drama, with different factions either trying to protect or harm them because of the baby. They would have to rely on each other and a few trusted friends to navigate this new and dangerous situation.
One idea could be that the baby has some sort of special power. Since Elijah is a powerful vampire and Katherine has her own unique charm and skills, their baby might inherit something extraordinary. Maybe the baby can control the minds of vampires or has an uncanny ability to sense danger.
One idea could be that Elijah discovers he is going to be a father during a time of great turmoil in the supernatural world. His family's enemies might see this as a weakness and target him and his unborn child. Another plot could involve Elijah trying to protect the mother of his child from the dangerous vampire politics and ancient curses that could harm her or the baby. Maybe he has to make a deal with a powerful witch to ensure a safe pregnancy for the mother.
One idea could be that Elena and Elijah travel back to a time when their families had a different relationship. They could try to change the course of history to prevent some of the tragedies that happened to their families. For example, they might stop a feud that led to a lot of bloodshed.
Another plot could involve the main character in the fanfiction realizing that they got married too young and now they are having second thoughts. This could lead to a series of self - discovery and relationship - testing events. For example, they might meet someone new who makes them question their marriage, but in the end, they realize the value of their relationship.
One common plotline is how they deal with the reactions of their families and friends. Since their relationship might be unexpected, it can create a lot of drama. For example, Elena's friends from her original circle might be skeptical or even hostile at first.
It could also focus on their personal growth within the marriage. Bella might have always been a bit shy and Elijah helps her come out of her shell. He encourages her to pursue her dreams, like starting her own small business. In turn, Bella helps Elijah become more in touch with his emotions and they both become better versions of themselves through their relationship.
One idea could be that Naruto is banished due to a false accusation against him that endangers the village's secrets. His wife, say Hinata, decides to go with him. They start a new life in a small, remote village, and Naruto uses his skills to protect the new place from various threats, gradually earning the respect of the locals.