My Mom just sent this email:

Dad is having some trouble with motion sickness. He gets nauseated when he moves or the light changes. So they're going to do a head scan today to see if anything is happening there. They're also concerned about a new tumor in his spine that is dangerously close to the nerves. It seems like we make progress in some areas and then go backwards in others. We had hoped to return home by next week, but are still not sure. Colin will fly down when we're ready to go so that I won't have to make the trip by myself with Jere should an emergency arise.
...
We have to talk to the radiologists today and find out if he still qualifies for the strontium shot and how much time in between does he need in order to begin chemotherapy.
Meanwhile, I'm comfortable here at the guest house next to the hospital and am able to get an afternoon nap and go to bed early.