What has happened?

As Diana told us, I could follow the story more easily than the last time. Still, it was hard for me to understand the whole thing so any kind of corrections are welcomed!

While the part 1 was mainly about the man and the boy travelling the road, the part 2 contained some actions and the man and the boy encountered other people in part 2.
Also, it becomes clear that the man is the biological father of the boy.

What I found most interesting about this part is that the man seems to have two sides of him. When he's with the boy, he's all nice and caring , yet when he encounters other survivors he becomes very logical and tough. This is clearly shown on pg 66. The man and the boy sees a group of survivors referred to as "bad guys" and they try to hide themselves at first but the man's eyes meet one of the group member's eyes. Then the man stand up for themselves and when the group member threatens the boy, the man moves swiftly and kills the group member.

I was really surprised because I thought the man would not be able to hurt other people. This part shows how much the man loves the boy and how much he is willing to sacrifice for the boy. Still, the man was so harsh and I wonder if the killing was necessary.

The part I also found memorable was the dialogue between the man and the man's wife.
The dialogue goes like this :
We're survivors.
Survivors?
Yes.
What in god's name are you talking about? We're not survivors. We're the walking dead in a horror film.
I'm begging you.
I don't care. I don't care if you cry. It doesn't mean anything to me.
Please.
Stop it.
I'm begging you. I'll do anything.
Such as what? I should have done it a long time ago. When there were three bullets in the gun instead of two. I was stupid. We've been over all of this. I didn't bring myself to this. I was brought. And now I'm done. I thought about not even telling you. That would probably have been the best. You have two bullets and then what? You can't protect us. You say you would die for us but what good is that? I'd take him with me if it weren't for you. You know I would. It's the right thing to do.
You're talking crazy.
No, I'm speaking the truth. Sooner or later they will catch us and they will kill us. They will rape me. They'll rape him. They are going to rape us and kill us and eat us and you won't face it. You'd rather wait for it to happen.But I can't. I can't.

As you can see the woman is determined, very cold and cynical. The man is begging her to stay but the woman won't hear of it. The woman thinks that they are not survivors, rather cursed(And I agree with her.)and they're merely living because the man forced them to survive. Now she has made up her mind and she's saying good bye to the man.
As I read this part, I wondered who "they" were. "They" seem to be very dangerous and unhumane.
Are "they" the same people whom the man and the boy encountered?
Also, why are there only two bullets, instead of three? Did the man use one in the name of protection?

There's a line on page 57 where it says I've taken a new lover. He can give me what you cannot. Death is not a lover. Oh yes he is. This particular line shows how the man and the woman view the life and the death differently. As I read this book I could tell that the man has a great desire to live and protect the boy. For the woman, death is actually a rest and an escape route from the real world.

The boy seems to adjust well to the fact that his mother is gone , however he says he misses her mom and he wishes he were dead too.


I wonder what will happen to the man and the boy if they move to the South. Will they be happy? Will they settle in?
I hope they reach their final destination and become happy.

Question : Did the woman merely leave the man and the boy? Or did she kill herself? Very confusing. I still can't figure it out. Someone please help me!!!!!