Plot twists and extra bits

The Hunger Games #3/ Divergent #2

Tris and Tobias both survive the war but they decide to no longer stay in Chicago. They move outside and outside Chicago is Panem. They find District 12 where they hope to hide Tris's divergence and Tobias makes a living for them by working in the mines.
They live a happy life, excluding their slight poverty like everyone in district 12, but a hunter named Mr Hawthorn did occasionally sell some stuff to them. They got older, and had two kids, two gorgeous girls. But then everything went down from there.
Tobias was killed in a mine explosion and they got significantly poorer. Tris went into a state of shock and her eldest had to take over running the house. She went out hunting and got them food and looked after her little sister.
Tris got a bit better, but not in time. The 74th Hunger Games was coming up and it was the first year her youngest could be reaped.
When it got to the reaping, something that changed Panem from then on happened. Tris gasped at the name that was reaped, taken aback, she wasn't expecting it.
"Primrose Everdeen."
Before she could do anything, her eldest daughter stepped out.
"I volunteer as tribute!" She said
And Tris's daughter, Katniss took her younger sisters place in the games. You know the story from then on.