If Sansa was pregnant in this fanfiction, it could potentially be a catalyst for a new alliance. Jaime, despite his past actions, has certain skills and influence. This could be used to protect Sansa and the unborn child. However, they would face many enemies. The Lannisters might not accept Sansa easily, and the Northmen may be skeptical of Jaime's intentions. Sansa, on the other hand, would have to use her wits to navigate through this difficult situation, perhaps trying to use the pregnancy to her advantage in the power games of Westeros.
Often, Sansa is portrayed as a powerful figure in fanfiction, and Jaime's character can add an interesting dynamic. They might be shown as having conversations that never occurred in the show. For example, Jaime could offer Sansa his insights about the political situation in King's Landing, which she could use to her advantage in her own political maneuvers in the North.
There are also fanfictions where their relationship takes a more romantic turn. This can be controversial as in the original series, their interactions were not of that nature. However, in the world of fanfiction, writers explore the idea of them finding solace in each other. Jaime's honor (or his new - found sense of it) and Sansa's grace could be seen as complementary, leading to a relationship that defies the expectations of the original Game of Thrones narrative.
A pregnancy for Sansa in relation to Jaime would completely shift their story arcs. For Jaime, it could be the ultimate test of his new - found moral compass. He has already broken away from some of his family's more cruel ways, and this would be another step in that journey. For Sansa, it would add another layer of vulnerability and strength. She has grown from a naive girl into a strong woman, and a pregnancy would force her to be even more resilient. It could also lead to some interesting interactions with other characters, like Tyrion who has his own complex relationship with both Jaime and Sansa.
It could be about Jaime and Sansa fulfilling a vow within the context of the 'Game of Thrones' universe. Maybe it's a story where Jaime has made a vow to protect Sansa, and the fanfic details how that vow is carried out. It might involve political intrigue, battles, or personal relationships as seen in the original series.
Another option is to check out some dedicated 'Game of Thrones' fan communities on social media platforms like Reddit. There are often threads where fans share and discuss their favorite fanfics. You might be able to get a link or more information about where to find this particular fanfic from other fans in those communities.
Theon Greyjoy can also be an interesting character to pair with Sansa. Their complex relationship can be developed further in fanfiction. Maybe Theon is trying to make amends for his past actions towards Sansa and they end up forming an unexpected alliance to face common enemies.
There's also 'Jaime and Cersei: The Unwritten Chapters'. This fanfiction fills in the gaps between the events shown in the show. It gives more in - depth exploration of their emotional states, especially during the times when they were separated, and how they coped with the challenges to their relationship.
I really liked 'Jaime Lannister: A Different Path'. In this fanfiction, Jaime decides to side with the Starks early on. It's an interesting take as it completely changes the course of his character in a believable way. There are some great character interactions that are not in the original show.
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.