Maybe they first bond over their mutual friends. They are both part of a group, and they often find themselves left alone together while the others are off doing something else. During these times, they start having long conversations about life, their hopes, and their fears. These conversations gradually bring them closer until they fall in love and then the idea of them making love becomes part of the story.
It could start with them relying on each other in difficult situations. Let's say there is a series of supernatural attacks in their town. Stefan, with his vampire strength, and Bonnie, with her magic, keep saving each other. Each time they save one another, their trust and admiration for each other grows. This growing trust and admiration over time can transform into love, and from there, the relationship could progress to the idea of them making love.
They might develop their relationship through shared secrets. For example, Stefan could tell Bonnie about his darkest past experiences as a vampire that he has never shared with anyone else. Bonnie, in turn, could open up about her struggles with magic. This mutual sharing of personal and often painful secrets would create a deep bond between them, which could lead to a romantic relationship and eventually to the more intimate aspect of making love.
Their relationship could develop through mutual respect for each other's power and knowledge. At first, they might be a bit wary of one another, but as they face challenges together, they start to trust each other more. They could share stories of their long lives and find common ground in their experiences.
One possibility could be that they start off as friends. Maybe they are on a dangerous adventure together, and in a moment of extreme closeness and shared vulnerability, their feelings turn romantic and lead to a loving encounter.
They would become more protective. Stefan, who has always been somewhat of a protector, would be even more so. Bonnie would also be very protective but in a different way, using her magic to safeguard the baby. Their relationship would deepen as they are united in their love for their child.
They would start to understand each other on a deeper level. Kol, who might have been more carefree before, would now take on more responsibilities. He'd learn about Bonnie's hopes and fears for the baby. Bonnie would also see a different side of Kol, a more nurturing side. They'd have to communicate more about things like the baby's future, what kind of life they want to give it, and how to handle any potential threats. Their relationship would transform from just a romantic one to a more family - oriented partnership.
Their friends' reactions would be a mixed bag. Some, like Matt, who is more on the human side of things, would be in awe of this supernatural pregnancy. He'd try to understand it from a human perspective and offer practical help like getting baby supplies from the human world. Meanwhile, the other supernatural friends would have different reactions based on their own agendas. For example, some witches might see Bonnie's pregnancy as a powerful event and either try to use it to their advantage or protect it out of a sense of duty to the witch community. Overall, their friends' reactions would add a lot of drama and support to the fanfiction story.
It could start to develop in new ways. For instance, if they go back to a time when Stefan was still with Elena, Caroline might see a different side of him. This could either make her fall for him more or create some tension between them. But as they work through these issues, they could end up with a deeper and more complex relationship. They might also discover new things about each other that they didn't know before, like hidden fears or desires from their pasts, which would bring them closer together.
Their relationship can be developed through shared adventures. For example, going on a quest to find a magical item that can help save Mystic Falls. This would force them to rely on each other and build trust.
Their relationship could develop with a lot of power struggles at first. Bonnie is used to being independent and Klaus is used to being in control. But over time, they might learn to respect each other's strengths. Maybe they start to combine their magic and vampire abilities for different purposes.
At first, it might be a reluctant partnership. Maybe they are forced to work together to survive some kind of threat in the pizzeria. During this time, they start to see the good in each other. Toy Chica might notice how Withered Bonnie is protective, and Withered Bonnie might see Toy Chica's intelligence. This mutual admiration could then turn into a deeper relationship over time as they continue to interact and support each other.
The relationship can be developed through communication. Before they make love, they could have a heart - to - heart conversation about their fears, hopes, and desires. This would strengthen their emotional bond and make the physical aspect more meaningful.