One idea could be that Derek and Casey initially struggle with the news of the pregnancy. They might be worried about how their families will react, especially considering their relationship might have been a bit rocky before. They could then gradually come to terms with it and start preparing for the baby, like decorating the nursery together.
Perhaps in the fanfiction, Derek and Casey find out they're pregnant during a time when they are facing some external challenges, like Casey's career aspirations or Derek's friendship issues. The pregnancy then becomes a catalyst for them to re - evaluate their priorities and grow closer as a couple. They support each other through the pregnancy, learning more about each other along the way.
A plot could revolve around the idea that Derek and Casey keep the pregnancy a secret at first. They are afraid of the judgment from their friends and family. As the pregnancy progresses, it becomes harder to hide, and they have to deal with the consequences of their secrecy. But through it all, they realize that their love for each other and the unborn child is what really matters.
One idea could be that Casey and Lily find out they're pregnant unexpectedly. They then have to deal with the reactions of their families and friends. Some might be supportive while others are skeptical. They also face challenges like preparing for the baby's arrival while still maintaining their own lives and relationships.
One idea could be that the Beast is initially shocked but then becomes extremely protective of Casey during her pregnancy. He might start learning about human pregnancy and all the care that is needed, like building a safe and comfortable place for Casey to rest.
A plot could revolve around their friends' reactions to the pregnancy. For example, some friends might be overly excited and start planning everything for them, while others could be jealous or have concerns that they don't voice directly. This could create some interesting relationship dynamics.
One idea could be that they face challenges from their families who are initially not supportive of their relationship now that Lydia is pregnant. Another could be that they discover some sort of supernatural complication related to the pregnancy. For example, the baby might have special powers that start to manifest during the pregnancy and they have to figure out how to deal with it.
A frequent theme might be the changing relationship dynamics between Casey and Derek. With the pregnancy, they may have to grow up faster and reevaluate their feelings for each other. There could also be themes of support, where they learn to rely on each other more. Another theme could be the anticipation and excitement of becoming parents, despite any difficulties that come their way.
One idea could be to focus on how Odette and Derek prepare for the baby. For example, they could be decorating the nursery together, choosing colors and furniture. Maybe Derek is really into building the crib himself, while Odette is more concerned with the softness of the bedding.
One idea could be that they face unexpected challenges during the pregnancy. For example, Derek discovers a family curse that might affect the baby, and they have to find a way to break it. Another could be that Lydia has premonitions about the future of their child, which leads them on a journey to protect the unborn baby from a hidden danger.
Unfortunately, I can't point you to a particular 'casey and derek pregnant fanfiction'. But here are some tips for finding good ones. First, be as specific as possible in your search. Include details like the genre you prefer (romance, drama etc.). Second, don't be afraid to explore different tags related to the characters. And finally, join relevant fanfiction communities where you can ask for recommendations from other fans who might be more familiar with this specific type of fanfiction.
One idea could be Derek and Casey getting lost in a time - loop where they keep repeating the same day. They have to figure out how to break the loop while also dealing with their usual bickering and growing feelings for each other.
Derek could become more responsible. He might start taking on more household chores, like cooking healthy meals for Casey, and be more protective of her. Casey, on the other hand, could develop more patience. Dealing with the hormonal changes and the physical discomfort of pregnancy, she learns to control her temper better and communicate more effectively with Derek.