Bone scare

Diagnosis
Right before Thanksgiving, my husband had yet another bone scan. Since his PSA is still rising after having surgery and radiation, over the past years, they figure it was time for another look. At this time we were refered to Dana Farber in Boston. This is when things got a little more real, well sort of. It was there that we were told that the cancer had spread to his bones. There are a couple of spots on his ribs. My husband is not even 50 years old and now he has cancer in the bones!!!???
After a very long holiday season and test after test, it was concluded that the spots are compression fractures not cancer in the bones. They did also state that although things are better at the moment (compared to having it actually in the bones) that this also was a sign of things that could come. Why is his PSA still rising? Will it ever stop? He doesn't even have a prostate! Will it go into the bones? What will we do then?
It not only scared us but this also made us think a little more differently. Things could very easily/quickly change in a minute.
Our sons don't even know the battles my husband has gone through. They were so little when things started. This summer we plan on sitting the boys down, now aged 12, 10 and 5, to tell them of our "secret". This is something we thought 5-6 years ago that we wouldn't have to do. Not like this. It was supposed to be just an FYI to them as a more "family medical history".
For now we wait until next month. Another bone scan. Another scare?