ok the evolution of Katniss and having kids post:
Katniss is thinking from the earliest moments of the book how she never wants kids. This is Chapter 1, even before the Reaping, when Gale mentions running away, if they didn't have so many kids, obviously here, he's referencing their siblings, but then this exchange happens:
"I never want to have kids," I say.
"I might, if we didn't live here," says Gale.
"But you do," I say, irritated.
"Forget it," he snaps back.
This is literally page 9 in my copy from the library. Katniss has been thinking about how much they provide for their siblings already and she's also just given us exposition on her own parents-- her grief for her father and her resentment of her mother; it's also setting Gale up as a potential romantic partner, which Katniss readily rejects and is confused by the conversation at all (girly, you brought it up)
Again, in the first book, Katniss thinks she will never have children. This is nearing the end of the games-- it's just her and Peeta and Cato left-- and while Peeta sleeps, she lets herself for the first time think about making it home and what her future would be.
I think of Haymitch with all his money. What did his life become? HE lives alone, no wife or children, most of his waking hours drunk. I don't want to end up like that.
'But you won't be alone,"I whisper to myself. I have my mother and Prim. Well, for the time being. And then... I don't want to think about then, when Prim has grown up, my mother passed away. I know I'll never marry, never risk bringing a child into this world. Because if there's one thing being a victor doesn't guarantee, it's your children's safety. My kids' names would go right into the reaping balls with everyone else's. And I swear I'll never let that happen.
I included the long version and not just the part about never marrying, because Katniss recognizes she risks being alone forever. For her, even though it's terrible, it's better than having a child in this world, a world that is so horrific and threatening. She also automatically links marriage to having kids (as is natural), which complicates her relationships with both Gale and Peeta.
Catching Fire starts with a similar vein, but one Katniss now has to confront-- in order to keep those she loves safe, she will have to marry Peeta and live happily ever after with him. She wonders if President Snow will insist on them having babies, thinks it's likely a child of hers will end up in the arena because Victors' children sometimes do and Gale suspects the drawings are rigged. She reflects again on Haymitch's situation --unmarried, no children, wasted all the time-- and likens it to self-imposed solitary confinement.
Later, we get the fake baby drop, of course, and Katniss, processing, thinks
"Isn't it the thing I dreaded most about the wedding, about the future-- the loss of my children to the Games? And it could be true now couldn't it? If I hadn't spent my life building up layers of defenses until I recoil at even the suggestion of marriage or a family"
We're still on the same track, the recognition of her fear of having kids in the world she lives in. Interestingly, I think it's still a loss of her children to the Games, but a less painful one-- nonexistent, possible children that she'll never have.
Peeta later is trying to convince Katniss to be the one of them to survive by talking about her family back home, and when he doesn't mention the pregnancy, she knows he's being sincere. He even mentions Gale and Katniss takes it in a way that means he would be okay if she wanted to be with Gale. He transitions back to playing the Games by telling Katniss, "You're going to make a great mother you know."
Katniss then wonders if it could be more than just a Games manipulation-- "Like a reminder to me that I could still one day have kids with Gale? Well, if thatw as it, it was a mistake. Because for one thing, that was never part of my plan."
It's HERE that we get a bit of a kicker-- she thinks about how of the two of them, Peet is the one who should be a parent. And she imagines his children--
As I drift off, I try to imagine that world, somewhere in the future, with no Games, no Capitol. A place like the meadow in the song I sang to Rue as she died. Where Peeta's child could be safe.
I think it's the first time she's considered the possibility of a safe child, and it has to be Peeta's child. This isn't something she ever imagines about anyone else, even when she thinks about running away with Gale.
Children are a sign of hope, of a possibility of living in a world where they won't be sacrificed on the altars of the Capitol. In Mockingjay, Katniss frequently notes that District 13 has very few children, especially following an illness, and that children appear to be prized -- it's partially why it's hard for her to initially accept that the rebels would bomb children- recklessly, wastefully
But it's the epilogue of Mockingjay, where this all culminates-- where her hope finds fruition. She says "Peeta wanted them so badly," but it takes years for her stop dreaming and start trusting that she's made that world, where her children, where Peeta's children "take the words of the song for granted"
It's a perfect ending, because from the start Katniss has denied herself even the hope of children, develops to thinking maybe that it could be possible one day-- for someone as good as Peeta, and that maybe his children could be safe, at least-- and in the end, his children--her own children--are no longer a hope, but Real.