Hawk would be his usual comical self, but also very supportive. He'd make sure Elizabeth has plenty of food, especially his favorite scraps. And he'd be the first to volunteer to keep an eye out for any danger, even though he's not the most powerful. He'd be like a little guardian for the expecting couple.
Diane would probably be overjoyed. She's always been close to Meliodas and Elizabeth, and she would likely offer to protect them and help out in any way she can. Maybe she'd use her giant strength to build a special place for them to stay during the pregnancy.
Ban would probably be excited and start thinking about all the fun things he could teach the baby, like how to steal food without getting caught in a humorous way. King might be a bit more reserved at first but then offer to make the most beautiful crib with his powers. Diane would be super excited and offer to babysit all the time, cooing over how cute the baby will be.
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.
A lemon fanfic involving Elizabeth and Meliodas might explore their relationship in a more romantic and perhaps passionate way. It could include detailed descriptions of their interactions, like tender moments and deep emotional exchanges. However, it should also stay true to their characters' personalities as seen in the original work. For example, Meliodas' strong yet caring nature and Elizabeth's kind and determined self.
In many 'demon meliodas x elizabeth fanfic', the power dynamics between the two are interestingly portrayed. Meliodas being a powerful demon and Elizabeth having her own unique qualities. Some fanfics focus on how they support each other in times of trouble. Others might explore how their relationship evolves as they face different challenges together. It's a great genre for those who love to see different interpretations of these two beloved characters.
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.
One common theme is the anticipation and excitement of becoming parents. This can include scenes of them preparing a nursery or choosing baby names.
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.
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.
Love is a very common theme. Their love story is often explored in different ways, like how they overcome obstacles to be together. Another theme is sacrifice, as both characters in the original work are known for their willingness to sacrifice for each other.
The appeal of an Elizabeth and Meliodas lemon fanfic lies in the fact that their relationship is already so full of potential. Their chemistry in the original story is palpable, and a lemon fanfic can take that to a more intimate level. It allows fans to explore a side of their relationship that isn't fully explored in the official story.