Another theme is passion. The fanfictions usually depict the kisses as passionate moments that show the intensity of their feelings for each other. It makes the relationship seem more real and exciting.
Many also have a theme of sacrifice. Sometimes the kisses are a part of a bigger story where one or both of them are willing to sacrifice something for the other, and the kisses are a symbol of that strong bond that can withstand sacrifices.
Independence is a common theme. Without being tied to Edward, Bella can be shown as a more self - reliant character. She can make her own choices, pursue her own dreams, and not be influenced by the over - protective nature of Edward.
The theme of forbidden love also appears frequently. In the 'Twilight' universe, Bella and Jacob's relationship can be seen as somewhat forbidden due to various factors like the vampire - werewolf feud. So in these fanfictions, the kiss between them can symbolize breaking boundaries and facing the consequences of their actions.
For Edward, there's likely a mix of relief and fear. Relief because he's finally expressing his deep love for Bella, but fear because he's exposing his true feelings and also worried about how this will change things. For Bella, she's probably mostly filled with excitement and a bit of shock. The excitement of this new level of intimacy with Edward, and the shock that this moment she might have dreamed of is actually happening.
One common theme is the struggle between two worlds. Since she is part vampire and part human (or has strong ties to both), she often has to find her place. For example, in many stories, she has to deal with the secrecy of the vampire world while still wanting to be part of normal human society.
One common theme is the exploration of their eternal love. Writers often expand on how their love endures through different challenges. Another theme is the power dynamics, especially considering Edward's vampire nature and Bella's human - turned - vampire state in some stories.
A lot of these fanfictions also deal with the idea of acceptance. Bella has to accept her new state as a vampire, and the Cullen family has to accept her as one of their own. There are often challenges and conflicts related to this acceptance process.
A common theme is protection. Edward sees himself as Bella's protector, so when he punishes her, it's often because he believes she has endangered herself.
One common theme is the exploration of their love in different situations. For example, in some fanfictions, they face new threats to their relationship, like a new vampire clan that doesn't approve of their union. Another theme is the power dynamics between them. Since Edward is a vampire with special abilities and Bella is a human (at least initially), how they navigate that power difference is often explored.
Often, there could be themes related to the breakdown of trust. If Bella cheats with Edward, it would shatter the trust that exists in their relationship. Also, themes of jealousy might be present, not just from the partner who is being cheated on, but also from other characters who might have an interest in either Bella or Edward. There could also be a theme of self - discovery, as Bella might be exploring a different side of herself through this act of cheating.
Love and devotion are very common themes. Since they are mates, their deep love for each other is often explored. Another theme is the struggle between their different natures, with Edward being a vampire and Bella being human. Protection also comes up a lot, as Edward is always eager to protect Bella.