Love and trust would be important elements. Their unique relationship dynamics in the original show could be explored further in a marriage context. For example, how they support each other in dangerous situations.
I'm sorry, I don't have specific fanfiction to recommend directly. But you can try searching on fanfiction - dedicated websites like Archive of Our Own. Just use the keywords 'Root and Shaw marriage' and filter out the inappropriate ones.
One common theme is adventure. Given their work in the show, fanfictions often put them in new and exciting adventures where they have to use their skills to survive and succeed.
One common theme is loyalty. Their loyalty to each other is often explored, like in stories where one risks their life for the other. Another theme is trust. Since they work in a dangerous world, trust is crucial. And the theme of an unspoken bond is also popular. They seem to understand each other without words in many fanfics.
A great element could be the build - up of their relationship. In good fanfiction, it's not just a sudden kiss. There's the slow burn of their connection, like the way they gradually understand each other's quirks and grow closer through their shared experiences in the story's plot.
The idea of a root and shaw kiss in fanfiction is interesting because it can explore different aspects of their relationship. It could be a moment of passion, a sign of new - found trust, or a way to break the tension between them. Fanfiction writers can take the existing chemistry between the two characters from the original source and expand on it. They can create scenarios where this kiss is a catalyst for character growth, or it could be a way to delve into the unspoken feelings that might exist between Root and Shaw in the minds of the fans.
One common theme could be the challenges of raising a child in their rather unique situation. Given their characters' backgrounds and the world they are in, it would be interesting to see how they adapt to parenthood.
You can try Archive of Our Own (AO3). It has a large collection of fanfictions, including many for Root and Shaw. Just search for their names in the search bar, and you'll find a variety of stories.
Fanfiction.net is also a good place to look for Shaw and Root fanfiction. There are many talented writers who post their works there. However, the search function might be a bit less refined compared to AO3, but with a little patience, you can still find some great stories about them.
I'm not sure if there is a specific 'root shaw pregnant fanfic' available. Fanfics can be found on various fanfiction websites, but it would require some searching through those platforms dedicated to the relevant fandom.