Their relationship could become more intense. The hickeys might be a sign that they are moving to a more physical and passionate stage. Percy might become more protective of Annabeth as well, seeing how she's so openly showing her affection in this way.
Well, it could change in many ways. It might make their relationship more public in a sense, even if they don't mean it to be. Their friends might start to treat them differently, perhaps teasing them more. And they themselves might feel a new level of closeness and commitment. For example, Percy might start to think more seriously about their future together, and Annabeth might feel more confident in their relationship.
The relationship will likely grow stronger. They'll have to rely on each other more for daily tasks and support. For example, if Percy has a bad day at work or school, Annabeth will be there to comfort him right away, and vice versa. However, it could also be a bit strained at times. There might be moments when they feel suffocated by each other's presence, but they'll have to work through those feelings to keep their relationship healthy.
Well, they would probably communicate better. In Tartarus, they had to rely on clear communication to survive. So, back in the normal world, this would carry over. They'd be more open about their feelings, fears, and plans, which would strengthen their relationship in a more emotional way.
At first, it might become strained. Annabeth could be hurt and pull away from Percy. She might not want to be around him as much.
The fanfiction might be set in a scenario where Annabeth and Percy are in a secret relationship. Giving Percy hickeys could be a risky but exciting move for Annabeth. It could then lead to a series of events where they struggle to keep their relationship under wraps while dealing with the consequences of this very visible sign of their closeness.
Their relationship could become more intense. With her hearing his thoughts, they'd be more in tune with each other's feelings. It might make their bond stronger as they'd understand each other on a deeper level.
Well, it completely shatters their trust. Percy would be devastated and feel extremely betrayed. He would question all their past interactions and wonder if Annabeth ever really cared about him.
When Annabeth is mad, Percy will likely try to make it up to her. He might start doing all kinds of things like bringing her favorite foods, trying to help her with her projects. But Annabeth might not be so easily swayed. She'll be looking for a real apology and for Percy to show that he's learned his lesson. So the relationship becomes a bit of a power struggle, with Percy trying to regain her favor and Annabeth deciding whether he's worthy of it.
Their relationship would likely become more nurturing. They would have to rely on each other more as they take on the role of parents. For example, when the child has a nightmare about monsters, Percy might be the one to comfort the child first while Annabeth figures out how to better protect the home. Then they would discuss their concerns and fears for the child together, strengthening their bond as they face these new challenges as a couple.
They might become more protective. Since they are dreaming of having a daughter, they would start to think about all the potential dangers she could face. Their relationship could grow deeper as they bond over their shared hopes and fears for their future child.
It could bring them closer. Percy might find it endearing that Annabeth likes fanfiction about them, and it could lead to more open conversations between them about how they are perceived by fans.