One reason could be that she's scared. The idea of becoming a mother at that point in her life might be overwhelming, and she might think she can't handle it with Percy. Maybe she wants to protect Percy from the difficulties that come with the pregnancy as well.
Well, Percy is a complex character. His reaction could depend on how much he knew about the pregnancy before Annabeth left. If it was a complete surprise, he might be in denial for a while. He could also start to blame himself, thinking he had somehow failed her. And then he might eventually turn that pain into a determination to be a better person, whether or not he ever sees Annabeth again.
There might be some fanfictions out there that handle this topic in a more innocent or non - explicit way. However, it's important to note that in the official Percy Jackson series, such a situation doesn't occur. Some fanfiction authors may choose to explore this concept in a way that focuses on family, relationships, and growth without delving into inappropriate content. But it can be quite hard to find one that is completely family - friendly as this is a rather adult - themed idea to begin with.
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.
In such a fanfiction, the relationship between Annabeth and Percy would be in tatters. Annabeth would have to deal with the fact that the person she loved and trusted left her at such a crucial time. Their friends' relationships would also be affected. Those who are closer to Annabeth would probably cut off ties with Percy. However, there could be a chance for redemption. If Percy realizes his mistake and tries to make amends, it could lead to a slow rebuilding of their relationship, but it would be a long and difficult process, especially with a baby in the picture.
There might be some stress on their relationship too. The fear of the unknown, the potential danger to Annabeth during pregnancy in their dangerous world, and the responsibility of raising a child could all cause arguments or moments of doubt. But through it all, their love for each other and their growing family would likely keep them together and help them work through these difficulties.
One possible plot twist could be the discovery of some hidden power in their unborn child. In the world of Percy Jackson, powers are often unexpected. Maybe the baby has a unique ability related to both Annabeth's wisdom and Percy's water - controlling powers. This could lead to various adventures as they try to protect the baby from those who might want to use its power for evil.
Annabeth would likely be furious at first. She has been through so much with Percy, and for him to leave her for Calypso would seem like a betrayal. But then, she might also start to reflect on their relationship and what went wrong. She could become determined to win Percy back or to move on and prove that she doesn't need him.
Annabeth would probably be very hurt at first. She has a strong bond with Percy, and his leaving for someone else would be a huge blow to her self - esteem and her heart.
There are many fanfiction communities that might have such stories. Some authors like to explore the idea of Percy and Annabeth's future together in a more domestic setting. However, the quality can vary greatly. It's important to read reviews or summaries before diving into a particular story to make sure it's something you'll enjoy. You could also join fan groups dedicated to Percy Jackson and ask for recommendations there.