One common theme is forbidden love. Their relationship is not exactly socially acceptable in the context of the world they live in, so many fanfics explore the challenges they face because of this.
Redemption is also a theme in some fan fictions. Given their often - immoral actions in the original story, some fan fictions explore the idea of Jaime and Cersei seeking redemption, either together or separately, and how this affects their relationship and their place in the world of Westeros.
Another theme is the power struggle within their relationship. Since both Cersei and Jaime come from a power - hungry family, fanfiction might focus on how they vie for control over each other or over their shared destiny. This can lead to some really intense and dramatic storylines.
The relationship between Cersei and Jaime is complex and full of contradictions. Fanfics allow readers to explore different aspects of it that might not have been fully developed in the original work.
One common theme is redemption. Jaime, with his complex past as a member of the Kingsguard, often goes through a process of self - discovery and redemption, which is influenced by his relationship with Brienne. For example, in many fanfics, his actions towards her and his growth as a person are intertwined.
Power is a very common theme. Cersei is a powerful woman and Lancel is often caught in her web of power. Another theme is betrayal, as their relationship can be seen as a form of betrayal in the context of the existing power structures in Westeros.
One common theme is rivalry. Their competition for the throne and influence over the king is often the focus. For example, in many fanfics, Cersei sees Margaery as a threat to her position as Queen. Also, the theme of femininity and how they use their gender to their advantage or disadvantage in a male - dominated world is quite common. In some fanfics, Margaery uses her femininity more subtly than Cersei, which creates interesting dynamics.
Power is a common theme. Both Cersei and Daenerys are power - hungry in their own ways in the original series, and fanfics often explore how they either compete or cooperate regarding power. For example, in many fanfics, they fight over who will rule Westeros.
Power is a very common theme. Cersei is known for her thirst for power, and Ned is a man of honor who also has his own form of power in the North. Their interactions often revolve around power dynamics, like who has the upper hand in a situation.
One interesting plotline could be an alternate universe where Jaime decides to fully turn against Cersei much earlier. He might expose her secrets to save the realm from her tyranny, leading to a complex power struggle within King's Landing.
There's also 'Cersei and Jaime: A Different Path'. This fanfic takes an alternate route for their story. It imagines a scenario where they make different choices early on, which leads to a completely different set of events and interactions between them. It's really interesting to see how the characters develop in this new context.