A typical plotline might be Bella teaching Sam important life lessons. As the older sister, she has more life experience. So, she could be teaching Sam about responsibility, like how to take care of a pet or do household chores properly. In some fanfictions, there could be a plot where Bella and Sam are dealing with the loss of a parent. Bella would then be the one to console Sam and help him through the difficult emotions. She might also be the one to hold the family together during such tough times, and the story could revolve around how they both grow and heal together.
One common plotline could be Bella protecting Sam from various threats. Since she's the older sister, she might have a natural instinct to shield him. For example, in a world where there are supernatural elements, she could use her wits and any special abilities she might have to keep Sam safe from dangerous creatures. Another plotline could be centered around family drama. Maybe there are secrets in the family that Bella has to help Sam uncover or deal with. It could also involve Bella helping Sam navigate his relationships, whether it's friendships or romantic interests, by giving him advice based on her own experiences.
The relationship can be developed through shared experiences. For example, if they go on a camping trip together, they can bond over building a tent, cooking over a campfire, and sharing stories under the stars. This would make their relationship stronger as they rely on each other in the wilderness.
Another common theme is the discovery of self - identity. The older sister, while protecting Bella, also discovers more about herself. She might find out that she has some hidden powers or abilities. And in the process of dealing with all the Twilight - related events, she learns more about who she really is and what her role is in this strange world.
One common plotline could be Sam losing control of his wolf side and accidentally hurting Bella physically. This might lead to a rift in their relationship and a struggle for Sam to regain Bella's trust. Another could be emotional hurt, like Sam making a decision that goes against Bella's wishes in a way that makes her feel betrayed.
The relationship can be developed through shared experiences. For example, they could have a common hobby like reading. They can discuss their favorite books and exchange ideas, which deepens their connection. Another way is through facing difficulties together. If one of them gets sick, the other takes care of them, showing care and love.
Another theme is the reaction of the pack. In a lot of these fanfictions, the pack has to adjust to Sam being imprinted on Bella, which can cause some conflict and interesting dynamics within the group. It's not always easy for them to accept this new situation.
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.
In some fanfics, there could be a plotline centered around Bella's love life in the context of being Dean and Sam's sister. Maybe she falls for another hunter, and the brothers have to approve or disapprove. There could also be a plot where Bella is haunted by a past event that only she remembers, and she has to rely on her brothers to help her figure out what really happened and how to move on.
Common themes in 'sam spanks bella fanfiction' could include exploration of boundaries. In the relationship between Sam and Bella, the spanking element might be a way to test and redefine the boundaries they have with each other. Additionally, themes of trust and vulnerability could be present. For Bella, allowing Sam to engage in such an act might show a level of trust, and for Sam, it could be about handling Bella's vulnerability in a particular way.
Love and protection is another theme. Sam's possessiveness is usually rooted in his deep love and the need to protect Bella. This can be seen when they face threats from other supernatural beings. His possessive actions are sometimes seen as a way to keep Bella safe, although Bella may not always see it that way immediately.
I don't have direct knowledge of the common themes in such fanfiction. But often in fanfictions involving relationships like Bella and Sam, themes of love, attraction, and the exploration of their unique bond could be present. If it's 'lemon' fanfiction, there might be themes related to more adult - like romantic and physical interactions, but this is a more mature area.