Well, it could strengthen their relationship. Adrien, as Chat Noir, has always been in a similar situation. So he can really understand what Marinette is going through. They might start to rely on each other more and share their experiences of having a double life.
One common way for Marinette to get revenge in fanfiction could be through her fashion skills. She could design something that makes Lila look foolish. Like creating a dress for an event that has a hidden message or design that mocks Lila's lies when she wears it. It's a more creative and less confrontational way of getting revenge, but still very effective in showing Lila that Marinette is not one to be trifled with.
One interesting plotline could be that when Marinette is revealed, her friends are initially shocked but then quickly come to support her. They realize that all the times she seemed a bit flustered or had strange disappearances were because of her secret identity. For example, Alya might feel a bit guilty for not realizing it sooner but then uses her blog to help Marinette manage the public's reaction.
In these types of fanfictions, Marinette's act of getting hurt protecting Chat can have multiple consequences. It could inspire other characters to be more heroic. It might also make the overall story darker and more complex. For instance, if Marinette is severely injured, the city may be in more danger as Ladybug is out of commission for a while. This then forces other characters to step up their game and fill in the gap. It can also lead to some really emotional and heart - wrenching scenes between Marinette and Chat, as they deal with the aftermath of her injury.
Hawkmoth is usually the main antagonist. Since he is the one who akumatizes Marinette in the first place. He takes advantage of her negative emotions, like her insecurities or anger, to turn her into an akuma and use her for his own evil plans.
It could also be about the challenges they face during the pregnancy. Marinette might have health issues, and Adrien has to be extra careful and supportive. There could be a lot of emotional turmoil as they both grow up faster than they expected. They might also face some judgment from society, but they stand strong together to face it all.
In some fanfictions, Marinette gets over Adrien when she discovers new hobbies. For instance, she might take up painting or cooking. These new activities bring her joy and a sense of accomplishment. As she spends more time on them, she creates a new life for herself that doesn't revolve around Adrien. This helps her to let go of her old feelings for him.
In a fanfiction scenario where Marinette gets akumatized, it's a really fascinating concept. Marinette is known for her strong will and positive attitude, but if she's akumatized, all that could be flipped. Her akumatized form might be influenced by her repressed emotions, such as her jealousy over Lila's lies being believed so easily. Her akuma - powered actions could start to cause chaos in Paris. And it would be a great opportunity for the other characters to step up and try to save her, not just as Ladybug, but as Marinette. There could be a lot of self - discovery and character growth for everyone involved as they face this new and unexpected threat.
One possible plot could be Marinette getting akumatized because she feels constantly overshadowed by Ladybug's responsibilities. She might turn into an akuma with powers that are a twisted version of her creativity, like creating chaotic and unmanageable 'designs' that cause havoc in Paris.