Their relationship would go through a major transformation. They would start to see each other in a whole new light. Before, they were mainly focused on their love for each other and their superhero duties. But with a baby, they would become a family unit. There would be more shared responsibilities, and they would have to make sacrifices for the well - being of the baby. This would require a great deal of understanding and patience from both of them, which in turn would make their relationship more mature and complex.
Well, at first, they might be a bit nervous about how the baby will affect their relationship. But as time goes on, they would grow closer. They would have to communicate more about parenting decisions, which would strengthen their bond. Also, seeing each other as parents would add a new dimension of love. For example, Adrien seeing Marinette as the mother of his child would make him cherish her even more, and vice versa.
After getting married, they would become more open and trusting with each other. Since they know each other's identities as Ladybug and Chat Noir, there would be no more secrets between them. Their relationship would be more stable and they would support each other even more in their daily lives and superhero duties.
They would become even closer. Their love would grow deeper as they are about to start a family together. There would be more tender moments between them.
In many fanfictions where Adrien and Marinette are 'just friends', it often shows a different side of their dynamic. It might focus on their platonic adventures, like teaming up to solve a school mystery without any romantic undertones. This can be refreshing as it explores their characters beyond the typical love - interest aspect.
Adrien as a merman might become more in tune with the natural elements of the ocean. He could be more carefree and wild, as opposed to his somewhat reserved self on land. His love for adventure could be amplified, and he might be bolder in expressing his feelings, especially towards Marinette. Marinette as a mermaid could be more confident. The underwater world gives her a new sense of freedom, and she's less worried about the small things that bothered her on land. She might also be more assertive in her relationship with Adrien.
A great element in such a fanfiction could be the family aspect. Maybe they start thinking about having children. How would they raise their kids? Would their children inherit their superhero powers? And how would they protect their family from the villains in their world? Their friends like Alya and Nino could also play important roles in their married life, perhaps as godparents or just as good friends who are always there to offer advice and support.
Yes, there are plenty. There are fanfictions that focus on their budding romance, like the ones where they go on a cute date or have a heartfelt conversation that deepens their relationship in a sweet and innocent way.
Once upon a time, Marinette and Adrien's big day finally arrived. The city of Paris was adorned with flowers and ribbons. Marinette, in her beautiful white gown, walked down the aisle. Adrien, looking dashing in his suit, had tears of joy in his eyes. Their friends and family watched with love. As they said their vows, the whole place was filled with an air of magic. And then they were pronounced husband and wife, sharing a passionate kiss as confetti rained down on them.
Another reaction could be that Marinette pretends to cooperate with Adrien at first. By doing this, she can buy time and look for an opportunity to escape or get help. She might act as if she is okay with what is happening while secretly planning her next move, like leaving a clue for someone to find her or finding a way to disable Adrien temporarily.
Well, it really depends on how the author writes it. If the overprotectiveness is written in a way that respects Marinette's agency, it could be a cute and endearing aspect of their relationship. But if it comes across as controlling, it might make Marinette resent Adrien, and then they would have to work through those issues to have a healthy relationship.
One possible plot could be that Marinette and Adrien, after getting married, discover they are expecting a baby. They could face challenges like how to balance their superhero lives with impending parenthood. Maybe Hawk Moth resurfaces during Marinette's pregnancy, and they have to find a way to protect Paris and their unborn child at the same time.