The way I figure it, tommorow is promised to none of us, Any of us could pull out of the driveway & be hit by a truck and that's it.
If you've decided to live, and believe you'll be cured, that's a huge part of the solution. You can share that belief with your family.
I have stage 4 inoperable colon cancer & have been in Chemo for 13 months. I've seen my CEA counts (which correspond to the scans) go from 307 to 6.8 to 17.1 and now down to 9.0. I took a 3 month mini-vacation from Chemo (kept on with Avastin only) when I had a PET scan last October that showed no cancer. I was sure this was the permanent cure I'd been waiting for. But a scan in March showed it was back, still covering the same local area (outside of large & small intestines) but no measurable tumors. So I went on FOLFIRI (I'd had 12 rounds of FOLFOX).
I was 54 when diagnosed, my three children were all in their 20's and my first reaction was: "I've had a good life, no regrets, I'm ready to meet my maker". But when I talked to my wife & children I realized they weren't ready to let go of me. I prayed about it and specifically to be cancer free by the holidays so I could enjoy Christmas. Well that prayer was answered. Two big tumors went away and at Christmas I believed I was cancer free. Now I know that until it's been years and years you really don't know, even people that have been cancer free for 20 years still get tested and are permanently changed by it.
Spending time sitting in the Chemo chair I talked with lots of people who had stage 3 colon cancer, all had had operations to remove the tumor and were going though 12 cycles of Avastin + FOLFOX. As far as I know, all were successfully cured.
So my advice is always be truthful but positive around your children. Tell your wife everything in private (she wants to know). And take it one day at a time.