The twins and other questions

So she had kids by one of the men, I was not able to make out what she was saying at the end can someone explain what she was telling them. Does she know or guesses who the father was, or maybe there was someone else.

On another note why did she have sex with the Russian at the end. Was it to show him he was just as important.

Why did she turn away from the Finn when he tried to kiss her goodby.

What was the dialog with there goodby's