Perhaps Peeta, while hijacked, is made to target Katniss's friends and family as well. This would put Katniss in a difficult position of having to protect them from Peeta, while also trying to save him. It could lead to some very tense and emotional scenes. Also, Katniss might try to get help from other rebels who have experience with dealing with Capitol - inflicted mental torture to try and reverse what has been done to Peeta.
Well, it could be that Peeta's hijacked state is used as a weapon against Katniss by the Capitol. They might make him spread false rumors about her or try to turn other districts against her. Katniss, on the other hand, would have to fight not only against the Capitol's physical attacks but also this psychological warfare. She may start to doubt herself and her relationship with Peeta, but ultimately her love for him could be the key to his recovery.
Perhaps the story could focus on how Katniss and Peeta's relationship changes because of these two major events. With Katniss pregnant, she has new fears and hopes. And Peeta, being hijacked, is not the same person she once knew. Their journey could be about rediscovering each other. Katniss might use the idea of their future family as a motivation to bring Peeta back to his old self, while also preparing for the new life that's about to come.
Katniss would likely be determined to get Peeta back to his normal self. So, instead of just retaliating, she would focus on finding a cure or a way to reverse the hijacking. She might isolate herself with Peeta in a safe place to try and break through to him, using her own memories and emotions to reach the real Peeta hidden inside the hijacked version.
Katniss copes in multiple ways. She has to be strong for herself, Peeta, and the unborn child. Emotionally, she might bottle up some of her feelings at first, but as time goes on, she realizes she needs to let them out. She could start writing in a journal about her experiences, fears, and hopes. Physically, she takes care of herself as best as she can in the difficult situation, eating whatever nutritious food she can find and getting enough rest when possible. Socially, she tries to keep a small circle of people around her who can support her, and she also tries to slowly re - introduce Peeta to those who care about him in a way that won't trigger his hijacked state.
This kiss could potentially be a turning point. It might bring back memories for Peeta or make Katniss more determined to help him recover. It all depends on how the author weaves the story.
In some fanfictions, they might focus on rebuilding their lives together in a peaceful District 12. They could start a family, with Peeta teaching their children his baking skills and Katniss passing on her hunting knowledge. Their relationship could be one of mutual support and healing from the traumas they've endured.
One possible reason could be that in this fanfiction, Peeta might have had a past experience with Katniss that made him lose his love for her. For example, if Katniss made a choice that deeply hurt Peeta, like choosing the Games over their relationship in a crucial moment. Another reason could be that the author wants to explore an alternative storyline where Peeta's feelings change due to external influences such as political pressure in the Capitol forcing him to distance himself from Katniss. Or perhaps, in this fanfiction, Peeta meets someone else who makes him realize that his feelings for Katniss were not as deep as he thought.
One challenge could be the lack of resources. Their world is often harsh, and getting enough food, medical supplies for the pregnancy and for the baby later would be difficult.
Another type could be a story about their adventures outside of District 12. They could be traveling to other districts to help with the reconstruction efforts. Along the way, they encounter different cultures and people, and their relationship evolves as they rely on each other in these new situations.
A plot could be that their baby has some special abilities. Maybe it has an uncanny ability to sense danger, which is both a blessing and a curse. Peeta and Katniss have to figure out how to help their child control this ability while also keeping it a secret from those who might want to use the baby for their own gain. It could lead to a series of adventures as they move to different districts to keep the baby safe.
Well, it might be about how their relationship evolves during the pregnancy. Peeta could be extremely protective of Katniss, and they might have to rely on each other more than ever. They could also be visited by old friends from the Games, who offer their support and advice. And perhaps there are some health scares during the pregnancy that make them realize how precious their family - to - be is.