Another idea is that they could be worried about the future of their child. Since they both have complex backgrounds, they might be concerned about what kind of world their baby will grow up in. For example, will their child inherit Meliodas' demon powers? How will Elizabeth's status as a goddess affect the child? They could spend a lot of time discussing and preparing for these possibilities.
One plot idea could be that they face challenges from outside forces who are either jealous or see their unborn child as a threat. Maybe an old enemy tries to target Elizabeth during her pregnancy, and Meliodas has to go to great lengths to protect her and their future family.
Another plot twist might be related to Elizabeth's memories. Since she has had multiple reincarnations, there could be something in her past memories that affects the pregnancy. For example, a past life's vow or curse that she was unaware of starts to have an impact on her current state of being pregnant.
One great fanfiction in this theme might be 'The New Beginning' where it beautifully depicts their journey into impending parenthood. It shows how Meliodas is both excited and a bit nervous, and Elizabeth is full of anticipation.
Well, a plot could involve the baby being a key to peace in their world. Meliodas and Elizabeth have to protect the baby from various threats. Maybe the baby has a special connection to an ancient prophecy. So they travel around, meeting different characters who either want to help or harm them because of the baby. It could also show their daily life as new parents, like dealing with sleepless nights and the baby's first steps.
One plot idea could be Elizabeth's journey through pregnancy in a society with strict social norms. She might face challenges in how she is perceived by the upper class. Another could be her relationship with Darcy during this time, perhaps they grow closer as they anticipate the new arrival. Also, it could explore how her pregnancy affects her friendships and family relations.
One common theme is the anticipation and excitement of becoming parents. This can include scenes of them preparing a nursery or choosing baby names.
One plot idea could be Nejire's journey through pregnancy while still trying to be a hero. She might face challenges like hiding her condition from villains who could target her. Another could be the reactions of her friends and loved ones, like how they support her and deal with the changes in their relationships.
Well, perhaps in the fanfic, Elizabeth Turner's pregnancy causes a rift in her relationship with Will Turner. He's worried about her safety and wants her to stay on land, but she's determined to be part of the action. Also, it could be interesting if her pregnancy somehow has a connection to an ancient pirate curse. For example, the baby might be seen as a key to breaking or fulfilling the curse. Additionally, the story could focus on how the other pirates on the ship react to her pregnancy. Some might be protective, while others might see it as a liability.
There could be some stress on their relationship too. The responsibilities of impending parenthood might cause some arguments. For instance, they might disagree on where to raise the child or how to handle the child's potential powers. But these conflicts would ultimately strengthen their bond as they work through them together, learning more about each other in the process.
There are various fanfiction platforms where you can find such stories. For example, Archive of Our Own (AO3) is a great place to start. Just search for 'Elizabeth and Meliodas pregnant' on the site, and it will show you a list of relevant fanfictions.
Another plot could be centered around the changes in their relationship due to the pregnancy. They might become closer as they share the experience of the baby growing inside Zia. There could also be some external factors that try to disrupt their happiness, like an old enemy trying to cause trouble during this vulnerable time, but they overcome it together with their love for each other and the anticipation of their new family member.