One possible plotline could be the challenges they face in their relationship due to the unexpected pregnancy. Maybe their families react in different ways, creating drama and tension.
One common theme is political intrigue. Since they are from important families, many fanfictions involve them using their relationship to gain political advantages for their respective houses. Another theme is love against all odds, as their families may not approve or there could be other obstacles in their way.
Yes, there are quite a few. You can start by looking on fanfiction.net or Archive of Our Own (AO3). These platforms have a large collection of fanfictions, and you're likely to find some interesting stories about Robb Stark and Margaery Tyrell there.
I'm not sure specifically which 'Robb and Margaery pregnant' fanfiction is great. You could try searching on some popular fanfiction websites like Archive of Our Own. There might be various creative works there.
A more light - hearted fanfiction could be that Tommen and Margaery are overjoyed about the pregnancy. They start planning for the baby's future right away. They host grand feasts to celebrate, and Margaery involves all the ladies of the court in preparing baby clothes and the nursery. Tommen dreams of teaching his son or daughter how to ride a horse and be a great ruler one day.
Arya is often paired with Robb. They have a strong bond as siblings, and in fanfiction, they might team up to take revenge on their enemies or work together to restore the Stark family's honor. Arya's skills as an assassin could be very useful in Robb's campaigns.
One common theme is friendship. Often, the OC forms a strong bond with Margaery, either helping her through difficult times or being helped by her. Another theme is political intrigue. Since Margaery is a major player in the political scene in the 'Game of Thrones' universe, the fanfictions usually involve the OC getting caught up in the plots and schemes.
I'm not sure specifically which 'Margaery Tyrell lemon fanfiction' is good. Fanfiction quality can vary greatly. You might try searching on well - known fanfiction websites and look at the reviews and ratings to find some that are popular and well - written.
One common theme is power. Margaery is often depicted as someone striving for more power, whether it's within her family or in a larger political context. Another theme is love, be it unrequited or a strategic alliance of hearts.
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.