One idea could be that Lydia discovers she's pregnant and has to deal with the reactions of her friends and family. Maybe Stiles is the father and they have to figure out how to handle this new situation while also dealing with the supernatural threats in their town.
In a Lydia Martin pregnant fanfiction, the plot could revolve around her decision - whether to keep the baby or not. She could be facing a lot of pressure from different sides. Her friends might be supportive but some of the adults in town could have different opinions. Meanwhile, she also has to continue her studies and deal with the social implications of being a pregnant teenager in a small town.
Perhaps they find out they're pregnant unexpectedly. Stiles starts making all these plans for their future as a family right away. Lydia is more cautious, thinking about how this will change their lives completely. Their friends could also play a big role, some being super supportive while others might be skeptical. And they could have to deal with family reactions, like Stiles' dad being really excited and Lydia's parents having mixed feelings.
One possible plot idea could be about Lydia's journey through pregnancy. Maybe she discovers she's pregnant unexpectedly and has to deal with the reactions of her family and friends. For example, her parents might be disappointed at first if she's young, but then gradually come around to support her. Another aspect could be how she copes with the physical and emotional changes. She might find solace in a new friendship or an old acquaintance who has also been through pregnancy.
Well, perhaps in the fanfiction, Martin and Ruthie discover they're pregnant unexpectedly. They then start to attend parenting classes together. Martin could be really nervous about becoming a father but Ruthie is very calm and reassuring. They could also start shopping for baby items and have cute arguments over the color of the nursery.
Stiles would be a very likely candidate as they have a close relationship in the show. Their banter and connection could easily lead to a situation where they end up having a baby together in a fanfiction.
In the fanfiction, it could be that the pregnancy is a turning point in their lives. Lydia and Aiden could be part of a fantastical world where the pregnancy has some special meaning or power. For example, the baby could be prophesied to bring great change to their world. So they not only have to deal with the normal aspects of pregnancy like doctor visits and baby showers, but also protect the unborn child from those who might want to use its power for evil.
Perhaps in the fanfiction, Lydia is pregnant in a post - apocalyptic world. She has to find ways to protect herself and her unborn baby from various threats. This could involve teaming up with unexpected allies and facing difficult moral choices along the way.
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.
Maybe there's a mystery surrounding the pregnancy. Since they are in a world full of the supernatural, the baby could have some special powers even before birth. Some of the other characters like Scott and Stiles might suspect that there's something unusual about the pregnancy. They could try to investigate, which causes some tension between them and Lydia and Parrish, who just want to enjoy the pregnancy without all the scrutiny. But in the end, they all come together when they realize they need to protect the baby from some external supernatural threat.
One idea could be that Lydia's younger sister discovers Liam's werewolf secret and has to keep it from Lydia. Maybe she stumbles upon him during a full moon transformation and they form an unexpected bond over the shared secret.
The plot could involve them seeking advice from their friends. Stiles might be the one who gives Scott some practical tips on how to be a father, while Allison could offer Lydia emotional support. They could also have to deal with financial issues, like how to afford things for the baby. Scott might consider getting a part - time job, and Lydia could start thinking about scholarships or other ways to secure their future. And in the end, they welcome their baby into the world with love and hope.