Perhaps Percy's torture makes Annabeth realize the depth of her feelings for him. Before, she might have been unsure or in denial, but seeing him in such pain makes her confront her emotions. This could lead to a more intense relationship between them once Percy is saved. For example, she could be more open and affectionate towards him.
Another aspect could be that the torturers use Percy's pain as a way to try and manipulate Annabeth. They might offer to stop the torture if she gives them certain information or does something for them. This would put Annabeth in a very difficult moral dilemma, having to balance Percy's well - being with her own principles.
After the initial shock and anger, she would start thinking rationally. Annabeth is known for her strategic mind. So she'd start observing the situation, looking for any weaknesses in the captors' setup, any tools she could use to her advantage, all while trying to keep Percy's spirits up during the torture.
Perhaps there could be a plot where Annabeth discovers that the abuse has given Percy some hidden powers or a different perspective on his demigod abilities. So she encourages him to explore and master these new aspects of himself. Or, it could be that the news of Percy's abuse spreads among their friends, and they all come together to form a support system for him, which in turn strengthens their group as a whole.
Well, perhaps in the fanfiction, Annabeth could initially be in denial about being pregnant after Percy leaves. But as time goes on, she starts to accept it and decides to focus on building a better future for her and the baby. She might also get support from her friends like Grover, who could help her out in various ways, such as finding a safe place to stay and providing emotional support.
One possible plot development could be that Annabeth is filled with guilt and remorse. She might isolate herself from the rest of the demigod community. For example, she could leave Camp Half - Blood and go on a self - imposed exile. She would constantly be haunted by memories of Percy and struggle to come to terms with what she has done.
One possible plot development could be that they start making out in detention because of some built - up tension between them. Maybe they had been secretly crushing on each other for a while and the confined space of detention made it all come to a head. After they make out, they might start to worry about what their friends will think, especially if their relationship was previously just a friendship. Another development could be that a teacher catches them and they have to face the consequences, which could either bring them closer together as they deal with it as a couple or cause some friction between them.
In this fanfiction, it might be that the gods are influenced by an external dark force. This force convinces them that Percy is a threat. So, instead of a fair trial, they torture him in front of everyone. Percy, being a hero, would probably endure it with great courage and his friends might be on a quest to prove his innocence and save him from this unjust situation.
One interesting plot development could be that during the duel, they accidentally discover a new power or ability. For example, Percy might find a new way to control water that is triggered by the intensity of the duel with Annabeth.
In this type of fanfiction, it could be that the very essence of Tartarus affects the pregnancy in strange ways. Maybe the unborn child starts to show signs of being influenced by the dark magic or the primordial forces there. This could lead to a race against time as they try to find a way to counteract these effects. Also, the relationship between Annabeth and Percy would likely be put to the ultimate test. They would have to rely on each other more than ever, and their love for each other and the baby would be what drives them forward. Their friends on the outside might also sense something is wrong through some sort of magical connection and start their own quest to try and reach them in Tartarus.
The other demigods at Camp Half - Blood would also be in chaos. Percy was like a leader to many of them. His death could lead to a lack of confidence among the younger demigods. Some might even start to question the protection of the gods. Zoe's survival could also lead to her taking on a more prominent role in guiding and protecting the demigods, which is a big change from her previous situation.
In some fanfictions, a possible plot development is that Percy and Annabeth discover a long - lost secret or power within Tartarus. This could be something that gives them an edge in their fight to escape or a knowledge that changes their perspective on the whole Greek mythology world. As they explore Tartarus, they may find ancient artifacts or meet forgotten gods who have been trapped there for ages. These encounters can lead to unexpected alliances and revelations that add depth to the story.