Castle Pokemetroid
Spoilers
Right. I knew something happened to Katniss like that. I just wasn't entirely sure.
But she had kids? I think I remember that she mentioned in the story that she wouldn't ever want to have kids.
I believe a lot of that was to do with her fear that one of her kids could end up in the arena. Of course, that fear was almost certainly shared by other females in Panem, but it wasn't really discussed openly.
As for the epilogue, I feel it's more bittersweet than anything. Yes, we do get all that stuff about Katniss, Peeta and their kids (kind of like the epilogue to the "Harry Potter" series) but the last couple of paragraphs suggest that Katniss has never really recovered from her experiences.