What is Mother’s question and what is her family’s reaction to it?

From the text:

Mother asks us,
Should we leave our home?
Brother Quang says,
How can we scramble away
like rats,
without honor, without dignity,
when everyone must help
rebuild the country?
Brother Khôi says,
What if Father comes home
and finds his family gone?
Brother V says,
Yes, we must go.