Amy
Sounds like they have caught it very early.
This is a roller coster ride for all family members. You and your family will have lots of support here. Great information. Keep your family informed of what Dad is going threw.
We have 12 and 15 year old boys. 4 years ago my wife had breast cancer, surgery and recovery I was worried for them then. Then I got this great Cancer. The kids will do well if they are informed of what is happening. Let them vent as well. Good luck and our prayers and thoughts are with you.