Some fanfictions explore a romantic relationship between Sam and Bela. Given their different personalities and backgrounds, it makes for a complex and often angst - filled relationship. Writers might explore how they overcome their differences and build a relationship, especially considering Sam's more moral - centered nature and Bela's more self - serving ways at first.
One common theme is redemption. Since Bela has a rather shady past in the show, many fanfictions explore her journey towards redemption, often with Sam being a part of that journey. For example, he might be the one who believes in her potential for change.
Often, authors portray Bela as a cunning and resourceful character. She's a thief in the Supernatural world, so she's depicted as being able to get out of tough situations using her wits and skills.
One popular storyline could be a magical or cursed situation that causes one of them to become pregnant against the normal laws of nature. For example, a spell gone wrong in a hunt that has unforeseen consequences. Another could involve some sort of alternate universe where male pregnancy is the norm and Sam and Dean have to navigate this new reality while still dealing with their usual hunting duties. And sometimes, it might be a really out - there concept where they are impregnated by some sort of otherworldly being as part of a deal or a plot to either save or destroy the world.
There's a fanfic called 'Bela's Secret Mission with Sam'. In this story, Bela has a secret mission that she needs Sam's help with. It's full of mystery and action, and the author does a great job of writing their interactions. It really delves into their personalities and how they might work together outside of the main show plot. And also, 'Sam and Bela: The Lost Chapters' is a collection of short stories that offer different takes on their relationship.
In Supernatural fanfiction, a frequent plotline involving Sam and Bela Talbot is that of a reluctant partnership. Bela might drag Sam into one of her heists that ends up being more than she bargained for, and they have to face some terrifying supernatural entity together. Or perhaps Bela double - crosses Sam at first, but then realizes she needs his help to survive a situation. There are also plotlines where Sam tries to reform Bela, seeing some good in her that she doesn't even see in herself.
In Supernatural fanfiction, Sam and Bela Talbot often have a complex relationship. Bela is a thief and a bit of a wildcard. Sam, on the other hand, is more morally upright. Their interactions can range from adversarial, as Bela is often involved in schemes that the Winchesters, including Sam, oppose. However, there can also be an underlying attraction or at least a mutual fascination. Bela represents a different world from Sam's, and that contrast can create interesting dynamics in fanfiction.
In some fanfictions, it could be a miscommunication situation. Sam might think he's doing the right thing in a hunt, but John disagrees. So, John spanks Sam not just as a punishment but also as a way to make him see his perspective. Also, it could be related to Sam's relationship with the supernatural side of himself. John might be trying to keep Sam's human side dominant by using this rather extreme form of discipline.
One popular storyline could be about how they deal with the reactions from their friends and family. Their friends might be shocked at first but then become very supportive. Another could be them preparing for the baby, like shopping for baby clothes and setting up the nursery together. It could also involve them facing challenges in their relationship due to the pregnancy stress, but in the end, they grow stronger as a couple.
One great fanfiction is 'The Hunt for Redemption'. It delves into the complex relationship between Dean and Bela during a particularly dangerous hunt. Their interactions are filled with tension and an underlying attraction.
One interesting storyline could be the baby sister having special powers that she has to learn to control. Maybe she can communicate with spirits in a unique way, different from Sam and Dean, which adds a new dynamic to their hunting adventures.