One possible fanfiction could be that Clark and Lois are in the middle of a dangerous situation in Smallville. Maybe there's a meteor - related disaster about to happen. In the heat of the moment, Clark realizes his true feelings for Lois and they share a passionate kiss, which gives Clark the extra motivation to save the town.
Clark's reaction would be complex. At first, he might be in shock. But then, he'd feel a deep sense of joy and responsibility. He would do everything he could to support Lois. He'd use his powers subtly to make her life easier during the pregnancy, like getting things she needs quickly or protecting her from any physical harm. He'd also be thinking about how to raise a child with his special abilities in a world that doesn't know about his true self.
Another theme is how their relationship changes. Often, they become closer and more reliant on each other. For example, Lois might rely on Clark's super - strength for little things around the house during her pregnancy. And Clark becomes more protective of Lois.
Love and sacrifice are also prevalent themes. They love their baby so much that they are willing to sacrifice a lot. Lois might sacrifice some big career opportunities to be with the baby, and Clark might risk his identity or even his life to keep the baby safe. These themes are what make Clark and Lois baby fanfiction so interesting and relatable.
One popular Lois and Clark fanfiction story could be those that explore their life after getting married. For example, stories where they face new challenges in their relationship while still saving the world. Another type might be the ones that rewrite certain episodes from a different perspective, like how Lois might have felt during a particular dangerous encounter that was more focused on Clark in the original show.
Emotion is a key element. The anticipation, the love, or the surprise that leads to the kiss. For example, in many fanfictions, Lois might be in danger and Clark's relief when she's safe leads to a passionate kiss.
One main storyline could be the relationship between Lois and Clark. Their love - hate relationship at first and how it evolves into a deep romantic bond. Another might be Clark's struggle to balance his Superman identity with his normal life as Clark Kent. He has to keep his powers a secret while still using them to save the day.