The antagonist could be an ancient and powerful ghost entity that believes the birth of a child with Danny's heritage will disrupt the balance between the human world and the Ghost Zone. So it sets out to stop the pregnancy. Another idea is a mad scientist type of human who wants to use the baby's potential powers for his own evil purposes. He could be constantly spying on the Fentons and devising plans to get his hands on the unborn child. There could also be a group of ghosts who are opposed to the idea of a half - ghost having a family in the human world and they work together to try and create chaos for the Fentons during the pregnancy.
A possible plot for this fanfiction is that Maddie discovers she's pregnant during a particularly intense time in Danny's ghost - fighting career. This causes them to reevaluate their priorities. They could decide that Danny needs to cut back on some of his more dangerous ghost - related activities. The story might also explore how their relationship changes during the pregnancy. There could be tender moments of Danny talking to the baby in Maddie's womb, sharing his hopes and fears for the future. Additionally, the fanfiction could show how the local ghost community reacts to the news, some being happy for them while others might be a bit more suspicious.
One common theme is the discovery of secrets. Danny has his secret as a half - ghost, and in fanfiction, there are often scenarios where Maddie either discovers this or gets close to it. This creates a lot of tension and drama in the stories.
Another angle in fanfiction could be the emotional bond. Maddie might have an unspoken understanding of Danny that she doesn't fully realize herself. Some fanfictions may play with this idea, showing how Danny secretly hopes for his mother's approval and love, especially when it comes to his ghost - related activities. It could also be about how Maddie's scientific pursuits sometimes interfere with her relationship with Danny, and how they overcome these obstacles in the fan - created stories.
One interesting aspect could be their family dynamic. In fanfiction, they might have different interactions that deviate from the original story. For example, they could have heart - to - heart conversations that deepen their understanding of each other. Another aspect is how their relationship can be explored in different settings, like in a more adventurous or mysterious situation. This can add new layers to their characters.
Danny and Maddie's relationship would go through a major transformation. Danny would probably cut back on his more reckless behavior, like his impulsive ghost - fighting stunts. Maddie would depend on Danny more for emotional support. They would start making plans for their family, like where they would live, how they would raise the child. Their relationship would no longer just be about their love for each other but also about their love for the new life they are bringing into the world.
One way is by giving them new challenges. For example, they could face a new type of ghost that requires them to use their skills in different ways. This would force them to grow and develop. Another way is through their relationships with other characters. If Danny makes new friends, how does Maddie react? It can show different sides of their characters.
I'm not sure specifically about fanfictions that involve 'lemons' in relation to Danny and Maddie Fenton. 'Lemon' in fanfiction often implies mature or inappropriate content which is not always easy to find in family - oriented fandoms like Danny Phantom. However, you could try searching on some specialized fanfiction websites, but be aware of the site's rules regarding such content.
A plot could revolve around Maddie and Danny trying to keep the pregnancy a secret from the whole town because they're afraid of how people will react. As the pregnancy progresses, it becomes harder to hide. Meanwhile, Danny is still dealing with his ghost - fighting duties, and he has to balance that with taking care of Maddie. There could also be a sub - plot where some of Danny's ghost enemies start to see him in a new light, seeing his vulnerability and newfound responsibility.
Family dynamics is also a big theme. How does Danny's ghostly side affect the family as a whole? And how does Maddie play a role in that? Fanfictions might show Maddie trying to protect Danny from other threats in the ghost world, or the family coming together to face a big ghost - related crisis while Danny and Maddie have a special bond within that family unit.
Fanfiction.net is also a good place. There are many Danny Phantom fanfics there. Look for tags related to Maddie Fenton. However, the quality can vary, so you might have to do some sifting through the stories.