Another reaction could be that Katniss tries to investigate. She's a curious person, especially when it comes to things that affect her. So she might start asking around about the girl Peeta was with. She could try to find out who she is, how Peeta knows her, and what their relationship really is. This way, she can make a more informed decision about how to handle the situation rather than just jumping to conclusions.
Katniss could also be hurt. She might retreat into herself and become more reserved. She'll probably start overthinking things like whether Peeta ever really cared about her or if he's been interested in this other girl all along. And this could affect her performance in other aspects of her life in the fanfiction, like her hunting or her relationships with other friends.
She might get angry. Katniss has a fiery side, and seeing Peeta with another girl could trigger that. She could give Peeta the cold shoulder and refuse to talk to him.
In some fanfictions, this could be a turning point for Katniss. She might realize her true feelings for Peeta. Before seeing him with the other girl, she might have been denying her emotions. But now, seeing him with someone else, she could feel a pang of jealousy that makes her understand that she has deeper feelings for Peeta than she thought. This could then lead to her trying to win Peeta back, or at least figure out what's really going on between him and the other girl.
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 might be initially shocked. Given her own tough exterior, she may quickly try to restrain Peeta without overreacting. She could be more concerned about what's causing his flashback rather than her own injury at first.
Their friends would have a mix of reactions. Some, like Prim, would be overjoyed and start preparing for the baby right away. She'd knit little clothes and offer medical advice. Others, like Beetee, might use his technical skills to create some useful gadgets for the baby, like a self - warming crib. Johanna might seem indifferent at first, but then show her support in her own tough - love way, by teaching Katniss self - defense techniques even while pregnant.
In some versions of this fanfiction, Peeta could be a bit worried. Given the dangerous world they live in, he might be concerned about the safety of Katniss during the pregnancy and the future of the child. He could start making arrangements to ensure they have enough resources and protection, while also expressing his love and support for Katniss.
Katniss might become more open and less guarded. With Peeta by her side, she could start to trust more easily. Peeta, on the other hand, might become more assertive in protecting Katniss and their new family. His gentle nature could still be there, but he'd have a newfound determination.
They would become more united as they have a new life to protect. Their focus would shift from just each other to their baby, and they would work together even more closely.
They might have some disagreements, like how to raise the child. Katniss, who has grown up in a tough environment, might have different ideas compared to Peeta. But these differences would also help them understand each other better. They would communicate more and work through their issues together, making their relationship more solid.
Katniss would probably be very protective at first. She has been through so much in the Hunger Games, and she wouldn't want her daughter to go through any hardships. Peeta, on the other hand, would likely be more empathetic and try to understand his daughter's feelings.
Katniss might initially be a bit hesitant and worried, but she would quickly step up. She could use her skills to provide for the daughter during this time, like hunting to get extra food. Peeta would likely be more vocal about his support, talking to the daughter about his hopes and dreams for the future and how this new addition to the family can be a positive thing. He might also use his baking skills to make special treats for her. Overall, they would both be there for their daughter, drawing on their own relationship and the love they have for each other and their family.