Yes, there are many Peggy Carter fanfics. You can find them on various fanfic websites. Some focus on her adventures in the Marvel universe, her relationships with other characters like Steve Rogers in a non - sexual and respectful way. For example, there might be stories about her contributions to S.H.I.E.L.D. and how she overcame challenges in a male - dominated world.
I would recommend 'When Agent Carter Met Thor'. It's a unique take on the crossover concept. It explores how Peggy would interact with Thor, a very different kind of character from her own world. It has some great dialogue and action scenes that make it an enjoyable read.
A less obvious but still common theme is the exploration of different cultures. Sometimes the OC comes from a different background, and the story explores how that culture interacts with Peggy's world. This can lead to some really interesting storylines, like how different values and traditions play a role in solving problems or in the characters' relationships.
In some fanfictions, there could be creative interpretations where Peggy Carter is somehow related to being Tony Stark's mom. However, in the official Marvel canon, Howard Stark is Tony's father and Maria Stark is his mother.
One great Peggy Carter x Reader fanfiction is 'A New Beginning'. It beautifully captures the essence of Peggy's character and the relationship with the reader. The story is set in the post - war era and shows how the two characters' paths cross in a very believable way.
There could also be emotional challenges. Steve has already lost so much in his life, and the thought of losing Peggy or their unborn child could be overwhelming for him. Peggy, on the other hand, might be worried about how Steve will handle the stress and if he'll be able to be there for her throughout the pregnancy. Additionally, they might face judgment from their peers in the superhero community who think they should be more focused on their duties.