I am so sorry to hear about your wife, there is an ever growing fellowship of folks that are free and considered survivors, so take heart.
We have been living with IT for nine year with our eldest. Thought it was uterine cancer, turned out to be stage 4 colon cancer, five operations and several rounds of chemo and nothing for 24+ months. In the middle of the DDs treatments, I developed prostate cancer. Forty days of radiation. Now a survivor.
I cannot talk(type) any more, I can feel the tension building. Keep Calm and Carry On, take trips when you can and study, study, study about what's new in treatment and what has helped slow the growth like diet.
Sorry I have to go.